Morphology of Flowering Plants (NCERT Practice Paper)

Q1. In racemose inflorescence:

Correct Answer: (b)
In racemose inflorescence, the main axis (peduncle) continues to grow indefinitely, producing flowers laterally in acropetal succession (younger flowers at the tip, older at the base). The axis does not end in a flower. This type is seen in mustard, radish, and many other plants.

Q2. Regarding leaf, which statements are correct?
(i) It is a lateral, flattened structure.
(ii) It is the most important organ for photosynthesis.
(iii) It is attached to the stem by the leaf base.

Correct Answer: (d)
All three statements are true: leaves are lateral outgrowths with a flattened shape, they are the primary site of photosynthesis, and they are connected to the stem at the leaf base. These are fundamental leaf characteristics.

Q3. Match the seed types with their definitions:

Column-I	Column-II
A. Dicotyledonous seed	(I) Two cotyledons
B. Monocotyledonous seed	(II) One cotyledon
C. Endospermic seed	(III) Endosperm present
D. Non-endospermic seed	(IV) Endosperm absent

Correct Answer: (a)
Dicot seeds have two cotyledons; monocot seeds have one. Endospermic seeds retain endosperm; non-endospermic seeds absorb it during development. These are basic classification criteria.

Q4. Match the parts of a monocot seed:

Column-I	Column-II
A. Aleurone layer	(I) Proteinous layer
B. Scutellum	(II) Shield-shaped cotyledon
C. Coleoptile	(III) Sheath of plumule
D. Coleorhiza	(IV) Sheath of radicle

Correct Answer: (a)
In monocot seeds, aleurone layer is protein-rich; scutellum is the single cotyledon; coleoptile protects the plumule; coleorhiza protects the radicle. These are specific to monocot embryo structure.

Q5. The portion between two nodes is called:

Correct Answer: (b)
The internode is the segment of the stem that lies between two adjacent nodes. It provides spacing between leaves and contributes to the overall height of the plant. The length of internodes can vary depending on the species and environmental conditions, affecting the plant's architecture.

Q6. Match the venation and phyllotaxy with groups:

Column-I	Column-II
A. Reticulate venation	(I) Dicotyledonous plants
B. Parallel venation	(II) Monocotyledonous plants
C. Alternate phyllotaxy	(III) Single leaf at node
D. Opposite phyllotaxy	(IV) Pair of leaves at node

Correct Answer: (a)
Reticulate venation is typical of dicots, parallel of monocots; alternate phyllotaxy has one leaf per node, opposite has two. These are diagnostic features for plant groups.

Q7. Regarding gynoecium, which statements are correct?
(i) It is the female reproductive organ.
(ii) It consists of carpels.
(iii) Each carpel has stigma, style and ovary.

Correct Answer: (d)
All three statements are correct: the gynoecium is the female whorl, composed of carpels, and each carpel is differentiated into stigma (receptive surface), style (stalk), and ovary (containing ovules). These are the essential parts of the female reproductive organ.

Q8. Match ovary status and ovule arrangement:

Column-I	Column-II
A. Superior ovary	(I) Ovary above others
B. Half inferior ovary	(II) Same level
C. Inferior ovary	(III) Ovary below others
D. Placentation	(IV) Ovule arrangement

Correct Answer: (a)
Superior ovary: above other parts; half inferior: at same level; inferior: below; placentation: arrangement of ovules. These terms define the flower's ovary position.

Q9. Regarding flower, which statements are correct?
(i) It is a modified shoot.
(ii) It is the reproductive unit in angiosperms.
(iii) It has four whorls: calyx, corolla, androecium, gynoecium.

Correct Answer: (d)
All three statements are correct: a flower is a modified shoot specialised for reproduction, and it typically consists of four whorls arranged from outside to inside. These whorls perform protective, attractive, and reproductive functions.

Q10. Regarding monocotyledonous seed, which statements are correct?
(i) It has one cotyledon.
(ii) It is endospermic.
(iii) The embryo is small and situated in a groove.

Correct Answer: (d)
All three statements are correct: monocot seeds have a single cotyledon (scutellum), are usually endospermic, and the embryo is small and located in a groove. Examples include maize, wheat, and rice.

Q11. A leaf is called compound when:

Correct Answer: (d)
A compound leaf is one where the lamina is completely divided into distinct leaflets, with each leaflet having its own small stalk (petiolule) or being sessile. The incisions reach the midrib, separating the leaf blade into independent units. This is a key difference from simple leaves, where the blade is continuous or only shallowly lobed.

Q12. Regarding floral formula, which statements are correct?
(i) Br stands for bracteate.
(ii) K stands for calyx.
(iii) C stands for corolla.

Correct Answer: (d)
All three statements are correct: in floral formula, Br indicates bracteate condition, K represents calyx (sepals), and C represents corolla (petals). These symbols are standard in describing floral morphology.

Q13. Match seed classification:

Column-I	Column-II
A. Dicot seed	(I) Two cotyledons
B. Monocot seed	(II) One cotyledon
C. Endospermic	(III) Endosperm present
D. Non-endospermic	(IV) Endosperm absent

Correct Answer: (a)
Dicot seeds have two cotyledons; monocot seeds have one. Endospermic seeds retain endosperm; non-endospermic seeds do not. This classification is based on seed structure.

Q14. Assertion: In alternate phyllotaxy, a single leaf arises at each node. Reason: In opposite phyllotaxy, a pair of leaves arise at each node.

Correct Answer: (b)
Both statements accurately describe two different phyllotaxy patterns. However, the reason describes a different type of phyllotaxy and does not explain why alternate phyllotaxy has only one leaf per node. They are separate facts, not causally linked. Thus both are true but the reason is not a valid explanation for the assertion.

Q15. Assertion: The corolla is composed of petals. Reason: Petals are usually brightly coloured to attract insects.

Correct Answer: (b)
The corolla is indeed made up of petals, and petals often have bright colours to attract pollinators. However, the reason describes a characteristic of petals, not why the corolla is composed of them. Composition is a structural fact, while colour is an adaptation. Both statements are true, but the reason does not explain the assertion.

Q16. Match the placentation types with their features:

Column-I	Column-II
A. Marginal placentation	(I) Ridge along ventral suture
B. Axile placentation	(II) Ovules attached to axis
C. Parietal placentation	(III) Ovules on inner wall
D. Basal placentation	(IV) Ovule at base

Correct Answer: (a)
Marginal: ovules borne along the ventral suture; axile: on a central axis; parietal: on the ovary wall; basal: at the base of the ovary. These are the four main types of placentation in flowering plants.

Q17. Assertion: The pericarp may be dry or fleshy. Reason: It is the wall of the fruit.

Correct Answer: (b)
The pericarp is indeed the fruit wall, and it can be dry (e.g., in capsules) or fleshy (e.g., in mangoes). However, the reason that it is the fruit wall does not explain why it varies between dry and fleshy; that variation depends on the type of fruit and its mode of seed dispersal. Both statements are true, but the reason does not explain the assertion.

Q18. Match placentation features:

Column-I	Column-II
A. Marginal	(I) Ventral suture ridge
B. Axile	(II) Attached to axis
C. Parietal	(III) Inner wall
D. Basal	(IV) Base of ovary

Correct Answer: (a)
Marginal: ovules on a ridge along ventral suture; axile: on a central column; parietal: on ovary wall; basal: at the base. These are the distinct locations of ovule attachment.

Q19. The lateral, generally flattened structure borne on the stem is called:

Correct Answer: (c)
Leaves are the primary photosynthetic organs of most plants, arising laterally from nodes on the stem. They are typically flattened to maximize surface area for light absorption and gas exchange. Leaves also have a distinct arrangement (phyllotaxy) and are essential for the production of food through photosynthesis.

Q20. The underground part of the flowering plant is called:

Correct Answer: (b)
The root system is the portion of the plant that grows downward into the soil. It is responsible for anchoring the plant and for absorbing water and essential minerals from the soil. In contrast, the shoot system comprises all parts above ground, including stems, leaves, and flowers.

Q21. Match the plant parts with their primary descriptions:

Column-I	Column-II
A. Root system	(I) Underground part
B. Shoot system	(II) Above ground part
C. Leaf	(III) Photosynthesis
D. Flower	(IV) Reproduction

Correct Answer: (a)
Root system is the underground part; shoot system is above ground; leaf is the primary organ for photosynthesis; flower is the reproductive unit. These are fundamental associations that define the roles of each plant part.

Q22. The male reproductive organ in a flower is:

Correct Answer: (c)
The androecium is the male reproductive organ of a flower and consists of one or more stamens. Each stamen has an anther (containing pollen grains) and a filament. Pollen grains produce male gametes, which are essential for fertilisation.

Q23. Regarding dicotyledonous seed, which statements are correct?
(i) It has two cotyledons.
(ii) It is non-endospermic.
(iii) The cotyledons are fleshy and full of food.

Correct Answer: (d)
All three statements are correct: dicot seeds typically have two cotyledons, most are non-endospermic (endosperm absorbed during development), and the cotyledons become fleshy food reserves. Examples include pea, gram, and bean.

Q24. The region of the stem where leaves are born is called:

Correct Answer: (a)
Nodes are the specific points along the stem where leaves are attached. They are usually slightly swollen and are the sites from which buds and branches may also arise. The internode is the portion between two consecutive nodes, while the apex is the growing tip and the base is the lower end.

Q25. Match the ovary positions with their descriptions:

Column-I	Column-II
A. Hypogynous	(I) Gynoecium at highest position
B. Perigynous	(II) Gynoecium in centre
C. Epigynous	(III) Margin of thalamus grows up
D. Superior ovary	(IV) Ovary above other parts

Correct Answer: (a)
In hypogynous flowers, the gynoecium is at the highest position; perigynous has the gynoecium at the centre; epigynous involves upward growth of the thalamus; superior ovary is positioned above the other floral parts. These terms describe the relative positions of the ovary.

Q26. Regarding floral diagram, which statements are correct?
(i) It shows the arrangement of floral parts.
(ii) Calyx is the outermost whorl.
(iii) Gynoecium is in the centre.

Correct Answer: (d)
All three statements are correct: a floral diagram is a cross-sectional representation showing the arrangement of floral parts; the calyx is outermost; the gynoecium is centrally located. This diagram is a valuable tool for understanding floral structure.

Q27. The whorl composed of petals is called:

Correct Answer: (b)
The corolla is the second whorl, composed of petals. Petals are often brightly coloured and scented to attract pollinators such as insects and birds. They play a crucial role in the reproductive process by facilitating cross-pollination.

Q28. Match the fruit layers and types:

Column-I	Column-II
A. Epicarp	(I) Outer fruit layer
B. Mesocarp	(II) Middle fruit layer
C. Endocarp	(III) Inner fruit layer
D. Drupe	(IV) One-seeded fruit

Correct Answer: (a)
Epicarp is the outer layer, mesocarp the middle, endocarp the inner. A drupe is a fruit with a single seed (e.g., mango, coconut). These are standard terms in fruit morphology.

Q29. Assertion: The seed is formed from the ovule after fertilisation. Reason: It contains an embryo and seed coat.

Correct Answer: (b)
The ovule develops into a seed after fertilisation, and that seed typically consists of an embryo and a seed coat. However, the reason describes the structural components, not the developmental origin. Both are true, but the reason does not explain why the seed forms from the ovule.

Q30. Assertion: The androecium is the male reproductive organ. Reason: It consists of stamens.

Correct Answer: (a)
The androecium is defined as the collective term for all stamens in a flower, and stamens are the male reproductive structures producing pollen. Thus the reason correctly explains that the androecium is male because it is composed of stamens, the male organs. Both statements are true and the reason is a valid explanation for the assertion.

Q31. The green expanded part of the leaf with veins and veinlets is called:

Correct Answer: (c)
The lamina, or leaf blade, is the broad, flat, green portion of the leaf where most photosynthesis occurs. It contains a network of veins (vascular bundles) that transport water, minerals, and sugars. The lamina's shape, size, and venation pattern are key features used in plant identification.

Q32. The outermost whorl of the flower is called:

Correct Answer: (a)
The calyx is the outermost whorl, made up of sepals. It often encloses the flower bud, providing protection before it opens. The sepals may be green or coloured and vary in number and shape among species.

Q33. Assertion: The region of maturation is where cells differentiate and mature. Reason: Some epidermal cells form root hairs in this region.

Correct Answer: (b)
The maturation zone is characterised by the differentiation of cells into various tissues, including root hairs from epidermal cells. However, the formation of root hairs is just one example of the maturation process, not the underlying reason why the region is called the maturation zone. Both statements are true, but the reason does not fully explain the assertion.

Q34. Regarding seed, which statements are correct?
(i) It is formed from the ovule after fertilisation.
(ii) It contains an embryo and seed coat.
(iii) The embryo has radicle, plumule and cotyledons.

Correct Answer: (d)
All three statements are correct: the seed develops from the ovule, consists of a seed coat and embryo, and the embryo contains radicle, plumule, and cotyledons. These are the structural and developmental hallmarks of a seed.

Q35. Regarding fruit, which statements are correct?
(i) It is a mature or ripened ovary.
(ii) It develops after fertilisation.
(iii) It consists of pericarp and seeds.

Correct Answer: (d)
All three statements are correct: a fruit is the mature ovary, develops post-fertilisation, and consists of the pericarp (fruit wall) and enclosed seeds. These define the botanical concept of a fruit.

Q36. Match venation and phyllotaxy with their plant groups:

Column-I	Column-II
A. Reticulate venation	(I) Dicotyledonous plants
B. Parallel venation	(II) Monocotyledonous plants
C. Alternate phyllotaxy	(III) Single leaf at each node
D. Opposite phyllotaxy	(IV) Pair of leaves at each node

Correct Answer: (a)
Reticulate venation is typical of dicots, parallel venation of monocots. Alternate phyllotaxy has one leaf per node, opposite has two. These are characteristic features used in plant identification.

Q37. When the veinlets form a network, the venation is called:

Correct Answer: (b)
Reticulate venation is characterised by a branched network of veinlets that interconnect, forming a mesh-like pattern. This type is commonly found in dicotyledonous plants, such as mango and rose. In contrast, parallel venation has veins running side by side without forming a network, typical of monocots.

Q38. Match members with their reproductive roles:

Column-I	Column-II
A. Sepals	(I) Outermost whorl
B. Petals	(II) Brightly coloured
C. Stamens	(III) Male reproductive organ
D. Carpels	(IV) Female reproductive organ

Correct Answer: (a)
Sepals are outermost; petals often colourful; stamens are male organs; carpels are female organs. This matching aligns with their typical roles and positions in a flower.

Q39. Regarding corolla, which statements are correct?
(i) It is composed of petals.
(ii) Petals are usually brightly coloured.
(iii) It attracts insects for pollination.

Correct Answer: (d)
All three statements are correct: the corolla is the petal whorl, petals are often colourful, and their primary role is to attract pollinators. This aids in cross-pollination and increases reproductive success.

Q40. Regarding androecium, which statements are correct?
(i) It is the male reproductive organ.
(ii) It consists of stamens.
(iii) Each stamen has a filament and an anther.

Correct Answer: (d)
All three statements are correct: the androecium is the male whorl, made up of stamens, and each stamen typically has a filament (stalk) and an anther (pollen-producing part). These are standard features of the male reproductive organs in flowers.

Q41. Assertion: The flower is a modified shoot. Reason: The shoot apical meristem changes to floral meristem.

Correct Answer: (a)
The conversion of a shoot apical meristem into a floral meristem is the very process that transforms a vegetative shoot into a flower. This meristematic change leads to the formation of floral organs instead of leaves and branches, thereby supporting the assertion that a flower is a modified shoot. Both statements are true and the reason directly explains the assertion.

Q42. A flower is a modified:

Correct Answer: (d)
A flower is considered a modified shoot because it develops from a shoot apical meristem that transforms into a floral meristem. The floral parts (sepals, petals, stamens, carpels) are homologous to leaves and are arranged on a reduced axis. This modification is specifically adapted for sexual reproduction.

Q43. The reproductive unit in angiosperms is:

Correct Answer: (d)
The flower is the reproductive structure of angiosperms, containing the organs necessary for sexual reproduction: stamens (male) and carpels (female). It facilitates pollination and fertilisation, leading to seed and fruit formation. Roots, stems, and leaves are vegetative parts and are not directly involved in reproduction.

Q44. Match inflorescence types and phyllotaxy:

Column-I	Column-II
A. Racemose inflorescence	(I) Main axis grows
B. Cymose inflorescence	(II) Main axis terminates
C. Alternate phyllotaxy	(III) Single leaf at each node
D. Opposite phyllotaxy	(IV) Pair of leaves at each node

Correct Answer: (a)
Racemose: indeterminate growth; cymose: determinate; alternate: single leaf per node; opposite: two leaves per node. These are clear distinctions.

Q45. Assertion: The root system is the underground part of the flowering plant. Reason: It provides anchorage and absorbs water and minerals.

Correct Answer: (a)
The root system indeed grows below ground, and its primary functions are anchorage, absorption, and storage. The reason directly explains the importance of the underground nature: being in the soil allows the root to fulfill these roles. Thus the assertion and reason are both true and the reason correctly explains the assertion.

Q46. Assertion: The midrib is the middle prominent vein in the leaf. Reason: It provides rigidity and acts as a channel for transport.

Correct Answer: (b)
The midrib is the most prominent central vein, and it does provide structural support and transport. However, its prominence is due to its large size and vascular tissue, not to its functions of rigidity and transport. Both are true, but the reason does not explain why the midrib is prominent.

Q47. In alternate phyllotaxy:

Correct Answer: (a)
Alternate phyllotaxy is the simplest arrangement, where a single leaf emerges at each node and leaves are spaced along the stem, often in a spiral. This reduces mutual shading and allows efficient light capture. It is common in many dicot plants like sunflower and mustard.

Q48. Match the terms related to ovary and ovules:

Column-I	Column-II
A. Superior ovary	(I) Ovary above other parts
B. Half inferior ovary	(II) Ovary at same level
C. Inferior ovary	(III) Ovary below other parts
D. Placentation	(IV) Arrangement of ovules

Correct Answer: (a)
Superior ovary is above the attachment of other whorls; half inferior is at the same level; inferior ovary is below; placentation describes the arrangement of ovules within the ovary. These are standard botanical terms.

Q49. Match the members with their characteristics:

Column-I	Column-II
A. Sepals	(I) Outermost whorl
B. Petals	(II) Brightly coloured
C. Stamens	(III) Male reproductive organ
D. Carpels	(IV) Female reproductive organ

Correct Answer: (a)
Sepals form the outermost whorl; petals are often colourful to attract pollinators; stamens are the male organs producing pollen; carpels are the female organs housing ovules. These characteristics are fundamental to floral biology.

Q50. Assertion: The region of elongation is responsible for growth in length. Reason: Cells in this region undergo rapid elongation and enlargement.

Correct Answer: (a)
In the zone of elongation, newly formed cells increase in size by absorbing water and expanding. This expansion pushes the root tip forward, resulting in an increase in root length. The reason correctly states the mechanism (elongation and enlargement) that brings about the growth in length, so it is the correct explanation.

Q51. The members of the calyx are called:

Correct Answer: (b)
The individual units of the calyx are called sepals. They are usually small, green, and leaf-like, but can also be coloured (petaloid) in some flowers. Sepals primarily protect the inner floral organs during the bud stage.

Q52. Regarding calyx, which statements are correct?
(i) It is the outermost whorl.
(ii) Its members are sepals.
(iii) It protects the flower in the bud stage.

Correct Answer: (d)
All three statements are correct: the calyx is the outer whorl, its units are sepals, and it encloses and protects the flower bud before anthesis. These are the defining features of the calyx.

Q53. Assertion: In racemose inflorescence, the main axis continues to grow. Reason: In cymose inflorescence, the main axis terminates in a flower.

Correct Answer: (b)
The assertion and reason are both correct descriptions of racemose and cymose inflorescences respectively. However, the fact that cymose inflorescence terminates does not explain why racemose inflorescence continues to grow; each type follows its own developmental pattern. Hence both are true, but the reason is not the correct explanation for the assertion.

Q54. Regarding seed coat, which statements are correct?
(i) It has two layers: testa and tegmen.
(ii) The hilum is a scar on the seed coat.
(iii) The micropyle is a small pore above the hilum.

Correct Answer: (d)
All three statements are correct: the seed coat consists of testa (outer) and tegmen (inner); the hilum is the attachment scar; and the micropyle is a small pore near the hilum that allows water entry during germination. These are important seed coat features.

Q55. The ascending part of the axis bearing branches, leaves, flowers and fruits is called:

Correct Answer: (b)
The stem is the main upward-growing axis of the plant. It develops from the plumule of the embryo and supports all lateral organs such as leaves, branches, flowers, and fruits. The stem also conducts water, minerals, and food between roots and leaves, making it a vital part of the shoot system.

Q56. Assertion: The gynoecium is the female reproductive organ. Reason: It consists of carpels.

Correct Answer: (a)
The gynoecium represents the female reproductive part of the flower and is made up of one or more carpels, each containing ovules. Carpels are the female reproductive units, so the reason correctly identifies the components that define the gynoecium as female. Both statements are true and the reason explains the assertion.

Q57. Assertion: The fruit is a mature or ripened ovary. Reason: It develops after fertilisation.

Correct Answer: (a)
After fertilisation, the ovary undergoes changes to become a fruit, which includes ripening and often enlargement. The reason correctly states that this development occurs post-fertilisation, which is the trigger for the ovary to mature into a fruit. Hence the reason correctly explains the assertion.

Q58. Match ovary types with descriptions:

Column-I	Column-II
A. Hypogynous	(I) Gynoecium highest
B. Perigynous	(II) Gynoecium in centre
C. Epigynous	(III) Thalamus grows up
D. Superior ovary	(IV) Ovary above other parts

Correct Answer: (a)
Hypogynous: gynoecium at top; perigynous: gynoecium central; epigynous: thalamus grows upward; superior ovary: ovary above other parts. These describe ovary position relative to other whorls.

Q59. Assertion: The root cap protects the tender apex of the root. Reason: It covers the root apex as it moves through the soil.

Correct Answer: (a)
The root cap is a thimble-like structure that covers the root tip. By physically covering the delicate meristematic cells, it shields them from abrasion and damage as the root pushes through soil particles. Thus the reason directly explains how the root cap protects the apex, making both statements true and the reason the correct explanation.

Q60. Regarding region of meristematic activity, which statements are correct?
(i) It is responsible for cell division.
(ii) Cells divide repeatedly.
(iii) It is found above the root cap.

Correct Answer: (d)
All three statements are correct: the meristematic region is the site of active cell division; its cells divide repeatedly to produce new cells; and it is located just above the root cap. This region gives rise to all root tissues.

Q61. Regarding venation, which statements are correct?
(i) Reticulate venation is found in dicots.
(ii) Parallel venation is found in monocots.
(iii) Venation is the arrangement of veins and veinlets.

Correct Answer: (d)
All three statements are correct: reticulate venation is characteristic of dicots, parallel venation of monocots, and venation itself is the pattern of veins in the leaf blade. These are key taxonomic and morphological features.

Q62. Regarding placentation, which statements are correct?
(i) Marginal placentation is found in pea.
(ii) Axile placentation is found in china rose.
(iii) Parietal placentation is found in mustard.

Correct Answer: (d)
All three statements are correct: pea exhibits marginal placentation; china rose has axile placentation; mustard shows parietal placentation. These are classic examples used to illustrate different placentation types.

Q63. Assertion: The seed is made up of a seed coat and an embryo. Reason: The embryo consists of a radicle, plumule and cotyledons.

Correct Answer: (b)
A seed indeed has a seed coat and an embryo inside. The embryo is composed of radicle, plumule, and cotyledons. However, the reason describes the internal structure of the embryo, not the overall composition of the seed. Both are true, but the reason does not explain why the seed is made of those two parts.

Q64. Match the floral whorls with their botanical names:

Column-I	Column-II
A. Calyx	(I) Sepals
B. Corolla	(II) Petals
C. Androecium	(III) Stamens
D. Gynoecium	(IV) Carpels

Correct Answer: (a)
The four whorls are calyx (sepals), corolla (petals), androecium (stamens), and gynoecium (carpels). These are the standard botanical terms.

Q65. Assertion: The embryo consists of a radicle, plumule and cotyledons. Reason: The radicle develops into the root and the plumule into the shoot.

Correct Answer: (b)
The embryo includes radicle, plumule, and cotyledons, and these structures will later develop into root, shoot, and food storage organs respectively. However, the reason describes the future fate of the radicle and plumule, not the reason why the embryo has these parts. Both are true, but the reason is not the correct explanation for the assertion.

Q66. Assertion: Reticulate venation is found in dicotyledonous plants. Reason: Parallel venation is found in monocotyledonous plants.

Correct Answer: (b)
It is a general rule that dicots exhibit reticulate venation and monocots show parallel venation. However, the reason given simply states the counterpart condition; it does not explain why dicots have reticulate venation. Both statements are independently true but the reason does not serve as an explanation for the assertion.

Q67. In opposite phyllotaxy:

Correct Answer: (b)
In opposite phyllotaxy, two leaves arise at the same node, situated on opposite sides of the stem. This arrangement can be decussate (successive pairs at right angles) or superposed (pairs aligned). Examples include plants like guava and mint, where the paired leaves optimise light interception.

Q68. Match the seed parts with their features:

Column-I	Column-II
A. Testa	(I) Outer seed coat
B. Tegmen	(II) Inner seed coat
C. Hilum	(III) Scar on seed coat
D. Micropyle	(IV) Small pore above hilum

Correct Answer: (a)
Testa is the outer coat, tegmen the inner coat, hilum is the attachment scar, and micropyle is the small pore for water entry. These are key structures on the seed surface.

Q69. A leaf is said to be simple when:

Correct Answer: (d)
A simple leaf has an undivided lamina, or if it is lobed, the incisions do not reach the midrib or main vein. Thus, the lamina remains as a single piece, even if it is deeply lobed. If the incisions extend to the midrib and the leaf is divided into separate leaflets, it is considered a compound leaf.

Q70. The arrangement of flowers on the floral axis is called:

Correct Answer: (b)
Inflorescence describes the pattern in which flowers are arranged on the main floral axis (peduncle). It can be classified into racemose (indeterminate) and cymose (determinate) types. Phyllotaxy deals with leaf arrangement, aestivation with arrangement of floral parts within a bud, and placentation with ovule placement.

Q71. Match the floral whorls with their members:

Column-I	Column-II
A. Calyx	(I) Sepals
B. Corolla	(II) Petals
C. Androecium	(III) Stamens
D. Gynoecium	(IV) Carpels

Correct Answer: (a)
Calyx is the whorl of sepals, corolla of petals, androecium of stamens, and gynoecium of carpels. These are the four floral whorls and their respective components.

Q72. Regarding embryo, which statements are correct?
(i) It consists of radicle, plumule and cotyledons.
(ii) The radicle develops into the root.
(iii) The plumule develops into the shoot.

Correct Answer: (d)
All three statements are correct: the embryo comprises radicle, plumule, and cotyledons; the radicle gives rise to the root system; the plumule develops into the shoot system. These are fundamental to seed germination and plant development.

Q73. When the veins run parallel to each other, the venation is called:

Correct Answer: (a)
Parallel venation occurs when veins run parallel to one another from the base to the tip of the leaf, without forming cross-connections. This venation pattern is characteristic of monocotyledonous plants, such as grasses, wheat, and maize. It contrasts with reticulate venation, where veins form a network.

Q74. In whorled phyllotaxy:

Correct Answer: (c)
Whorled phyllotaxy is characterised by three or more leaves arising from a single node, arranged in a circle or whorl. This pattern is less common but found in plants like Alstonia and Nerium. It provides multiple leaves at the same level, often forming dense foliage.

Q75. Regarding stem, which statements are correct?
(i) It is the ascending part.
(ii) It bears branches, leaves, flowers and fruits.
(iii) It conducts water, minerals and food.

Correct Answer: (d)
All three statements are correct: the stem grows upwards, supports lateral organs, and serves as a conduit for water, minerals, and photosynthates. It is the central axis of the shoot system.

Q76. Assertion: The calyx is the outermost whorl of the flower. Reason: It protects the flower in the bud stage.

Correct Answer: (b)
The calyx is indeed the outermost whorl, and it does protect the developing flower bud. However, its position as the outermost whorl is a structural feature, while protection is a function; the position does not by itself explain the function, nor does the function explain the position. Both are true but the reason is not the correct explanation for the assertion.

Q77. Regarding inflorescence, which statements are correct?
(i) Racemose inflorescence has a main axis that continues to grow.
(ii) Cymose inflorescence has a main axis that terminates in a flower.
(iii) Flowers are borne in acropetal order in racemose.

Correct Answer: (d)
All three statements are correct: racemose is indeterminate with acropetal flower development; cymose is determinate with the main axis ending in a flower. These are fundamental differences between the two inflorescence types.

Q78. Match the inflorescence and phyllotaxy types:

Column-I	Column-II
A. Racemose inflorescence	(I) Main axis continues to grow
B. Cymose inflorescence	(II) Main axis terminates in a flower
C. Alternate phyllotaxy	(III) Single leaf at each node
D. Opposite phyllotaxy	(IV) Pair of leaves at each node

Correct Answer: (a)
Racemose: indeterminate growth of main axis; cymose: determinate, ending in a flower. Alternate and opposite phyllotaxy are defined by the number of leaves per node. These are standard botanical terms.

Q79. Regarding phyllotaxy, which statements are correct?
(i) Alternate phyllotaxy has a single leaf at each node.
(ii) Opposite phyllotaxy has a pair of leaves at each node.
(iii) Whorled phyllotaxy has more than two leaves at a node.

Correct Answer: (d)
All three statements are correct: alternate = one leaf per node; opposite = two leaves per node; whorled = three or more leaves per node. These are the three main types of leaf arrangement on the stem.

Q80. Regarding root system, which statements are correct?
(i) It is the underground part.
(ii) It provides anchorage.
(iii) It absorbs water and minerals.

Correct Answer: (d)
All three statements are true: the root system is typically subterranean, anchors the plant, and takes up water and minerals from the soil. These are the primary functions of roots in flowering plants.

Q81. Assertion: The stem is the ascending part of the axis. Reason: It bears branches, leaves, flowers and fruits.

Correct Answer: (b)
The stem is indeed the ascending part of the plant axis, and it does bear branches, leaves, flowers, and fruits. However, the reason that it bears these structures does not explain why it is the ascending part; the ascent is primarily due to its development from the plumule and its negative geotropism. Both statements are true, but the reason is not the correct explanation for the assertion.

Q82. Regarding root cap, which statements are correct?
(i) It protects the tender apex.
(ii) It covers the root apex as it moves through soil.
(iii) It is found at the root tip.

Correct Answer: (d)
All three statements are correct: the root cap covers and protects the root apical meristem, facilitates soil penetration, and is located at the root tip. It is essential for root growth and survival.

Q83. In cymose inflorescence:

Correct Answer: (b)
Cymose inflorescence is determinate; the main axis ends in a flower, limiting its growth. Further flowers arise from lateral branches below the terminal flower, often in basipetal order (older flowers at the tip). Examples include Solanum and Calotropis.

Q84. Regarding pericarp, which statements are correct?
(i) It may be dry or fleshy.
(ii) It is the wall of the fruit.
(iii) It is differentiated into epicarp, mesocarp and endocarp.

Correct Answer: (d)
All three statements are correct: the pericarp is the fruit wall, which can be dry or fleshy, and in fleshy fruits it is often differentiated into outer, middle, and inner layers. These layers correspond to epicarp, mesocarp, and endocarp.

Q85. Assertion: The region of meristematic activity is responsible for cell division. Reason: Cells in this region divide repeatedly.

Correct Answer: (a)
The meristematic region is composed of undifferentiated cells that are continuously dividing. This repeated division is precisely what defines meristematic activity and makes the region responsible for producing new cells. Hence the reason is a direct and correct explanation for the assertion.

Q86. Assertion: The pulvinus is a swollen leaf base. Reason: It is found in some leguminous plants.

Correct Answer: (b)
A pulvinus is indeed a swollen leaf base, often seen in members of the legume family. However, the fact that it occurs in legumes does not explain why it is swollen; the swelling is due to specialised motor cells that allow leaf movements. Both statements are true, but the reason is not the correct explanation for the assertion.

Q87. Match the terms related to fruit and seed:

Column-I	Column-II
A. Fruit	(I) Mature ovary
B. Seed	(II) Mature ovule
C. Pericarp	(III) Fruit wall
D. Ovule	(IV) Seed origin

Correct Answer: (a)
Fruit develops from the mature ovary; seed from the mature ovule; pericarp is the fruit wall; ovule gives rise to the seed. These are the standard botanical definitions.

Q88. The arrangement of veins and veinlets in the lamina is called:

Correct Answer: (b)
Venation refers to the pattern in which veins are distributed within the lamina. It is an important taxonomic characteristic; dicots typically show reticulate (net-like) venation, while monocots show parallel venation. Phyllotaxy deals with leaf arrangement on the stem, aestivation with arrangement of floral parts in a bud, and placentation with ovule arrangement in the ovary.

Q89. Match placentation types with examples:

Column-I	Column-II
A. Marginal placentation	(I) Pea
B. Axile placentation	(II) China rose
C. Parietal placentation	(III) Mustard
D. Basal placentation	(IV) Sunflower

Correct Answer: (a)
Marginal placentation is seen in pea (legumes); axile in china rose (Hibiscus); parietal in mustard; basal in sunflower. These are classic examples for each type.

Q90. Match the embryonic parts with their development:

Column-I	Column-II
A. Embryo	(I) Embryonal axis
B. Radicle	(II) Develops into root
C. Plumule	(III) Develops into shoot
D. Cotyledons	(IV) Food storage

Correct Answer: (a)
The embryo consists of the embryonal axis; radicle forms the root; plumule forms the shoot; cotyledons store or absorb food. These are fundamental developmental roles in seed germination.

Q91. Assertion: The axillary bud develops into a branch. Reason: It is present in the axil of the petiole.

Correct Answer: (b)
Axillary buds are located in the angle between the leaf and the stem (axil), and they can develop into branches or flowers. However, the location of the bud does not explain why it develops into a branch; that is determined by hormonal and environmental factors. Both statements are true, but the reason is not the correct explanation for the assertion.

Q92. Assertion: The petiole holds the leaf blade to light. Reason: Long, flexible petioles allow leaf blades to flutter.

Correct Answer: (b)
The petiole supports the leaf blade and positions it to receive sunlight. Flexibility and fluttering are adaptations for cooling and air circulation, not directly for holding the blade to light. Both statements are true, but the reason describes a different function of petioles and does not explain the assertion.

Q93. Assertion: The leaf is a lateral, flattened structure. Reason: It is the most important vegetative organ for photosynthesis.

Correct Answer: (b)
Leaves are indeed lateral, flattened appendages that are specialised for photosynthesis. While photosynthesis is the primary function of leaves, the reason given does not explain why the leaf is flat and lateral; rather, the flat shape is an adaptation to increase surface area for light capture. Both statements are true, but the reason is not the correct explanation for the assertion.

Q94. Assertion: The ovary matures into a fruit after fertilisation. Reason: The ovules develop into seeds.

Correct Answer: (b)
After fertilisation, the ovary ripens into a fruit and the ovules become seeds. Both are consequences of fertilisation, but the development of ovules into seeds does not explain why the ovary matures into a fruit; they are parallel processes. Both statements are true, but the reason does not correctly explain the assertion.

Q95. The four different kinds of whorls in a typical flower are:

Correct Answer: (a)
A typical flower consists of four concentric whorls: the outermost calyx (sepals), followed by corolla (petals), then androecium (stamens), and the innermost gynoecium (carpels). These whorls are arranged on the thalamus (receptacle) and are essential for the flower's reproductive function.

Q96. Match the stem regions with their definitions:

Column-I	Column-II
A. Node	(I) Region where leaves are born
B. Internode	(II) Portion between two nodes
C. Apex	(III) Tip of the stem
D. Base	(IV) Bottom of the stem

Correct Answer: (a)
Node: the point of leaf attachment; internode: the segment between nodes; apex: the growing tip; base: the lower end of the stem. These definitions are standard in plant morphology.

Q97. The pattern of arrangement of leaves on the stem or branch is called:

Correct Answer: (b)
Phyllotaxy is the term used for the arrangement of leaves on a stem or branch. It ensures that leaves are positioned to receive maximum sunlight without shading each other. Common phyllotaxy types include alternate, opposite, and whorled. Venation refers to vein patterns, aestivation to floral parts, and placentation to ovule attachment.

Q98. Match the leaf parts with their functions/features:

Column-I	Column-II
A. Lamina	(I) Green expanded part
B. Petiole	(II) Helps hold blade to light
C. Leaf base	(III) Attaches leaf to stem
D. Stipule	(IV) Lateral small leaf-like structures

Correct Answer: (a)
Lamina is the blade; petiole is the stalk that positions the blade; leaf base attaches to stem; stipules are appendages at the base. Each part has a distinct role in leaf structure.