MCQ Practice Paper
Q1. In sponges, cells are arranged as loose cell aggregates. This organisation is called:
Explanation:
Sponges (Porifera) show cellular level of organisation, where cells form loose aggregates with minimal division of labour.[file:42]
Q2. Animals in which the body can be divided into identical left and right halves in only one plane exhibit:
Explanation:
Annelids, arthropods and most higher animals show bilateral symmetry, with a single plane dividing the body into mirror halves.[file:42]
Q3. Animals with ectoderm and endoderm only, and an intervening mesoglea, are termed:
Explanation:
Coelenterates and ctenophores are diploblastic with ectoderm, endoderm and an acellular mesoglea in between.[file:42]
Q4. The body cavity that is lined by mesoderm on all sides is called:
Explanation:
True coelom is a mesoderm-lined body cavity, found in annelids, arthropods, molluscs, echinoderms, hemichordates and chordates.[file:42]
Q5. Animals such as Platyhelminthes that lack a body cavity are referred to as:
Explanation:
Platyhelminthes are acoelomates because they lack any coelomic space between gut and body wall.[file:42]
Q6. Metameric segmentation in the body is first clearly observed in:
Explanation:
Annelids show true metamerism, with external and internal segmentation into similar units.[file:42]
Q7. Notochord is defined as:
Explanation:
Notochord is a mesodermal rod on the dorsal side in chordate embryos, providing axial support.[file:42]
Q8. Choanocytes or collar cells are characteristic of:
Explanation:
Sponges possess choanocytes lining spongocoel and canals which drive water current and capture food.[file:42]
Q9. Cnidoblasts containing nematocysts are used for defence and prey capture in:
Explanation:
Cnidoblasts (stinging cells) are diagnostic of phylum Coelenterata (Cnidaria) and occur on tentacles and body.[file:42]
Q10. Comb plates used for locomotion are present in:
Explanation:
Ctenophores bear eight rows of ciliated comb plates that help in swimming.[file:42]
Q11. The presence of a water vascular system is a characteristic feature of:
Explanation:
Echinoderms possess a water vascular system which helps in locomotion, feeding, and respiration.[file:42]
Q12. Flame cells are found in:
Explanation:
Flame cells are excretory organs in flatworms (Platyhelminthes).[file:42]
Q13. The excretory organ in annelids is:
Explanation:
Nephridia are the excretory organs in annelids.[file:42]
Q14. Malpighian tubules are the excretory organs in:
Explanation:
Malpighian tubules are the excretory organs in arthropods.[file:42]
Q15. The exoskeleton in arthropods is made up of:
Explanation:
The exoskeleton in arthropods is made up of chitin.[file:42]
Q16. The respiratory organ in molluscs is:
Explanation:
Molluscs have gills for respiration.[file:42]
Q17. The respiratory organ in insects is:
Explanation:
Insects have tracheae for respiration.[file:42]
Q18. The circulatory system in annelids is:
Explanation:
Annelids have a closed circulatory system.[file:42]
Q19. The circulatory system in arthropods is:
Explanation:
Arthropods have an open circulatory system.[file:42]
Q20. The excretory organ in molluscs is:
Explanation:
Molluscs have kidneys for excretion.[file:42]
Q21. The excretory organ in echinoderms is:
Explanation:
Echinoderms do not have a distinct excretory system.[file:42]
Q22. The excretory organ in hemichordates is:
Explanation:
The proboscis gland is the excretory organ in hemichordates.[file:42]
Q23. The excretory organ in chordates is:
Explanation:
Chordates have kidneys for excretion.[file:42]
Q24. The excretory organ in aschelminthes is:
Explanation:
Aschelminthes have an excretory tube for excretion.[file:42]
Q25. The excretory organ in cnidarians is:
Explanation:
Cnidarians do not have a distinct excretory system.[file:42]
Q26. Assertion: Porifera show cellular level of organisation.
Reason: In sponges, cells are loosely aggregated with minimal division of labour.
Explanation:
Sponges have loosely aggregated cells and show minimal division of labour, which is cellular level of organisation.[file:42]
Q27. Assertion: Cnidarians show tissue level of organisation.
Reason: In cnidarians, cells performing the same function are arranged into tissues.
Explanation:
Cnidarians have cells arranged into tissues, which is tissue level of organisation.[file:42]
Q28. Assertion: Platyhelminthes are acoelomates.
Reason: They lack a body cavity between the gut and body wall.
Explanation:
Platyhelminthes lack a body cavity, making them acoelomates.[file:42]
Q29. Assertion: Annelids show metamerism.
Reason: Their body is divided into segments called metameres.
Explanation:
Annelids have segmented bodies, each segment being a metamere.[file:42]
Q30. Assertion: Arthropods have jointed appendages.
Reason: Their appendages are segmented and jointed for locomotion.
Explanation:
Arthropods have jointed appendages for locomotion.[file:42]
Q31. Assertion: Molluscs have a calcareous shell.
Reason: The shell is secreted by the mantle.
Explanation:
Molluscs have a calcareous shell secreted by the mantle.[file:42]
Q32. Assertion: Echinoderms have a water vascular system.
Reason: The system helps in locomotion, feeding, and respiration.
Explanation:
Echinoderms have a water vascular system for multiple functions.[file:42]
Q33. Assertion: Hemichordates have a stomochord.
Reason: The stomochord is a structure similar to notochord.
Explanation:
Hemichordates have a stomochord, which is similar to the notochord.[file:42]
Q34. Assertion: Chordates have a notochord.
Reason: The notochord is a mesodermally derived rod-like structure.
Explanation:
Chordates have a notochord, which is a mesodermally derived rod-like structure.[file:42]
Q35. Assertion: Cnidarians have a gastrovascular cavity.
Reason: The cavity is used for both digestion and circulation.
Explanation:
Cnidarians have a gastrovascular cavity for digestion and circulation.[file:42]
Q36. Assertion: Aschelminthes have a complete digestive system.
Reason: Their alimentary canal has two openings, mouth and anus.
Explanation:
Aschelminthes have a complete digestive system with two openings.[file:42]
Q37. Assertion: Arthropods have an open circulatory system.
Reason: Their blood is pumped out of the heart and bathes the cells directly.
Explanation:
Arthropods have an open circulatory system with blood bathing the cells directly.[file:42]
Q38. Assertion: Molluscs have a mantle cavity.
Reason: The cavity is formed by the mantle and contains gills.
Explanation:
Molluscs have a mantle cavity formed by the mantle and containing gills.[file:42]
Q39. Assertion: Echinoderms have radial symmetry.
Reason: Their adult body can be divided into equal halves by any plane passing through the centre.
Explanation:
Echinoderms have radial symmetry in adults.[file:42]
Q40. Assertion: Hemichordates are bilaterally symmetrical.
Reason: Their body can be divided into equal left and right halves by only one plane.
Explanation:
Hemichordates are bilaterally symmetrical.[file:42]
Q41. Assertion: Chordates have a dorsal hollow nerve cord.
Reason: The nerve cord is located on the dorsal side and is hollow.
Explanation:
Chordates have a dorsal hollow nerve cord.[file:42]
Q42. Assertion: Cnidarians have nematocysts.
Reason: Nematocysts are used for defence and prey capture.
Explanation:
Cnidarians have nematocysts for defence and prey capture.[file:42]
Q43. Assertion: Aschelminthes are pseudocoelomates.
Reason: Their body cavity is not lined by mesoderm.
Explanation:
Aschelminthes are pseudocoelomates with a body cavity not lined by mesoderm.[file:42]
Q44. Assertion: Arthropods have chitinous exoskeleton.
Reason: The exoskeleton is made up of chitin and provides protection.
Explanation:
Arthropods have a chitinous exoskeleton for protection.[file:42]
Q45. Assertion: Molluscs have a radula.
Reason: The radula is a rasping organ used for feeding.
Explanation:
Molluscs have a radula for feeding.[file:42]
Q46. Assertion: Echinoderms have calcareous ossicles.
Reason: The ossicles form the endoskeleton and provide support.
Explanation:
Echinoderms have calcareous ossicles for support.[file:42]
Q47. Assertion: Hemichordates have a proboscis gland.
Reason: The proboscis gland is the excretory organ.
Explanation:
Hemichordates have a proboscis gland as their excretory organ.[file:42]
Q48. Assertion: Chordates have paired pharyngeal gill slits.
Reason: The gill slits are present on the pharynx and are paired.
Explanation:
Chordates have paired pharyngeal gill slits.[file:42]
Q49. Assertion: Cnidarians have two body forms, polyp and medusa.
Reason: Polyps are sessile and medusae are free-swimming.
Explanation:
Cnidarians have two body forms, polyp and medusa.[file:42]
Q50. Assertion: Arthropods have compound eyes.
Reason: Compound eyes are made up of many ommatidia.
Explanation:
Arthropods have compound eyes made up of many ommatidia.[file:42]
Q51. Match the following:
A. Porifera B. Coelenterata C. Platyhelminthes D. Aschelminthes
1. Cellular level of organisation 2. Tissue level of organisation 3. Organ level of organisation 4. Organ-system level of organisation
Explanation:
Porifera: cellular; Coelenterata: tissue; Platyhelminthes: organ; Aschelminthes: organ-system.[file:42]
Q52. Match the following:
A. Annelida B. Arthropoda C. Mollusca D. Echinodermata
1. Metameric segmentation 2. Jointed appendages 3. Mantle cavity 4. Water vascular system
Explanation:
Annelida: metamerism; Arthropoda: jointed appendages; Mollusca: mantle cavity; Echinodermata: water vascular system.[file:42]
Q53. Match the following:
A. Porifera B. Coelenterata C. Ctenophora D. Platyhelminthes
1. Choanocytes 2. Cnidoblasts 3. Comb plates 4. Flame cells
Explanation:
Porifera: choanocytes; Coelenterata: cnidoblasts; Ctenophora: comb plates; Platyhelminthes: flame cells.[file:42]
Q54. Match the following:
A. Aschelminthes B. Annelida C. Arthropoda D. Mollusca
1. Excretory tube 2. Nephridia 3. Malpighian tubules 4. Kidney
Explanation:
Aschelminthes: excretory tube; Annelida: nephridia; Arthropoda: malpighian tubules; Mollusca: kidney.[file:42]
Q55. Match the following:
A. Annelida B. Arthropoda C. Mollusca D. Echinodermata
1. Closed circulatory system 2. Open circulatory system 3. Kidney 4. Water vascular system
Explanation:
Annelida: closed circulatory; Arthropoda: open circulatory; Mollusca: kidney; Echinodermata: water vascular system.[file:42]
Q56. Match the following:
A. Porifera B. Coelenterata C. Ctenophora D. Platyhelminthes
1. Sponges 2. Jellyfish 3. Comb jellies 4. Flatworms
Explanation:
Porifera: sponges; Coelenterata: jellyfish; Ctenophora: comb jellies; Platyhelminthes: flatworms.[file:42]
Q57. Match the following:
A. Aschelminthes B. Annelida C. Arthropoda D. Mollusca
1. Roundworms 2. Earthworms 3. Insects 4. Snails
Explanation:
Aschelminthes: roundworms; Annelida: earthworms; Arthropoda: insects; Mollusca: snails.[file:42]
Q58. Match the following:
A. Echinodermata B. Hemichordata C. Chordata
1. Starfish 2. Balanoglossus 3. Fish
Explanation:
Echinodermata: starfish; Hemichordata: Balanoglossus; Chordata: fish.[file:42]
Q59. Match the following:
A. Porifera B. Coelenterata C. Platyhelminthes D. Aschelminthes
1. Choanocytes 2. Cnidoblasts 3. Flame cells 4. Excretory tube
Explanation:
Porifera: choanocytes; Coelenterata: cnidoblasts; Platyhelminthes: flame cells; Aschelminthes: excretory tube.[file:42]
Q60. Match the following:
A. Annelida B. Arthropoda C. Mollusca D. Echinodermata
1. Nephridia 2. Malpighian tubules 3. Kidney 4. Water vascular system
Explanation:
Annelida: nephridia; Arthropoda: malpighian tubules; Mollusca: kidney; Echinodermata: water vascular system.[file:42]
Q61. Match the following:
A. Porifera B. Coelenterata C. Ctenophora D. Platyhelminthes
1. Cellular level 2. Tissue level 3. Organ level 4. Organ-system level
Explanation:
Porifera: cellular; Coelenterata: tissue; Ctenophora: tissue; Platyhelminthes: organ.[file:42]
Q62. Match the following:
A. Aschelminthes B. Annelida C. Arthropoda D. Mollusca
1. Pseudocoelomate 2. Coelomate 3. Open circulatory 4. Kidney
Explanation:
Aschelminthes: pseudocoelomate; Annelida: coelomate; Arthropoda: open circulatory; Mollusca: kidney.[file:42]
Q63. Match the following:
A. Echinodermata B. Hemichordata C. Chordata
1. Water vascular system 2. Stomochord 3. Notochord
Explanation:
Echinodermata: water vascular system; Hemichordata: stomochord; Chordata: notochord.[file:42]
Q64. Match the following:
A. Porifera B. Coelenterata C. Ctenophora D. Platyhelminthes
1. Choanocytes 2. Cnidoblasts 3. Comb plates 4. Flame cells
Explanation:
Porifera: choanocytes; Coelenterata: cnidoblasts; Ctenophora: comb plates; Platyhelminthes: flame cells.[file:42]
Q65. Match the following:
A. Annelida B. Arthropoda C. Mollusca D. Echinodermata
1. Nephridia 2. Malpighian tubules 3. Kidney 4. Water vascular system
Explanation:
Annelida: nephridia; Arthropoda: malpighian tubules; Mollusca: kidney; Echinodermata: water vascular system.[file:42]
Q66. Match the following:
A. Aschelminthes B. Annelida C. Arthropoda D. Mollusca
1. Excretory tube 2. Nephridia 3. Malpighian tubules 4. Kidney
Explanation:
Aschelminthes: excretory tube; Annelida: nephridia; Arthropoda: malpighian tubules; Mollusca: kidney.[file:42]
Q67. Match the following:
A. Echinodermata B. Hemichordata C. Chordata
1. Water vascular system 2. Stomochord 3. Notochord
Explanation:
Echinodermata: water vascular system; Hemichordata: stomochord; Chordata: notochord.[file:42]
Q68. Match the following:
A. Porifera B. Coelenterata C. Ctenophora D. Platyhelminthes
1. Cellular level 2. Tissue level 3. Organ level 4. Organ-system level
Explanation:
Porifera: cellular; Coelenterata: tissue; Ctenophora: tissue; Platyhelminthes: organ.[file:42]
Q69. Match the following:
A. Aschelminthes B. Annelida C. Arthropoda D. Mollusca
1. Pseudocoelomate 2. Coelomate 3. Open circulatory 4. Kidney
Explanation:
Aschelminthes: pseudocoelomate; Annelida: coelomate; Arthropoda: open circulatory; Mollusca: kidney.[file:42]
Q70. Match the following:
A. Echinodermata B. Hemichordata C. Chordata
1. Water vascular system 2. Stomochord 3. Notochord
Explanation:
Echinodermata: water vascular system; Hemichordata: stomochord; Chordata: notochord.[file:42]
Q71. Match the following:
A. Porifera B. Coelenterata C. Ctenophora D. Platyhelminthes
1. Choanocytes 2. Cnidoblasts 3. Comb plates 4. Flame cells
Explanation:
Porifera: choanocytes; Coelenterata: cnidoblasts; Ctenophora: comb plates; Platyhelminthes: flame cells.[file:42]
Q72. Match the following:
A. Annelida B. Arthropoda C. Mollusca D. Echinodermata
1. Nephridia 2. Malpighian tubules 3. Kidney 4. Water vascular system
Explanation:
Annelida: nephridia; Arthropoda: malpighian tubules; Mollusca: kidney; Echinodermata: water vascular system.[file:42]
Q73. Match the following:
A. Aschelminthes B. Annelida C. Arthropoda D. Mollusca
1. Excretory tube 2. Nephridia 3. Malpighian tubules 4. Kidney
Explanation:
Aschelminthes: excretory tube; Annelida: nephridia; Arthropoda: malpighian tubules; Mollusca: kidney.[file:42]
Q74. Match the following:
A. Echinodermata B. Hemichordata C. Chordata
1. Water vascular system 2. Stomochord 3. Notochord
Explanation:
Echinodermata: water vascular system; Hemichordata: stomochord; Chordata: notochord.[file:42]
Q75. Match the following:
A. Porifera B. Coelenterata C. Ctenophora D. Platyhelminthes
1. Cellular level 2. Tissue level 3. Organ level 4. Organ-system level
Explanation:
Porifera: cellular; Coelenterata: tissue; Ctenophora: tissue; Platyhelminthes: organ.[file:42]
Q76. Regarding Porifera, which statements are correct?
1. They have cellular level of organisation.
2. They have choanocytes or collar cells.
3. They reproduce only asexually.
Explanation:
Porifera have cellular level of organisation and choanocytes, but they reproduce both sexually and asexually.[file:42]
Q77. Regarding Coelenterata, which statements are correct?
1. They have tissue level of organisation.
2. They have cnidoblasts.
3. They have a complete digestive system.
Explanation:
Coelenterata have tissue level of organisation and cnidoblasts, but their digestive system is incomplete.[file:42]
Q78. Regarding Ctenophora, which statements are correct?
1. They have comb plates.
2. They are bioluminescent.
3. They have a complete digestive system.
Explanation:
Ctenophora have comb plates and are bioluminescent, but their digestive system is incomplete.[file:42]
Q79. Regarding Platyhelminthes, which statements are correct?
1. They have flame cells.
2. They are acoelomates.
3. They have a complete digestive system.
Explanation:
Platyhelminthes have flame cells and are acoelomates, but their digestive system is incomplete.[file:42]
Q80. Regarding Aschelminthes, which statements are correct?
1. They are pseudocoelomates.
2. They have an excretory tube.
3. They have a complete digestive system.
Explanation:
Aschelminthes are pseudocoelomates, have an excretory tube, and a complete digestive system.[file:42]
Q81. Regarding Annelida, which statements are correct?
1. They have nephridia.
2. They have a closed circulatory system.
3. They have a complete digestive system.
Explanation:
Annelids have nephridia, a closed circulatory system, and a complete digestive system.[file:42]
Q82. Regarding Arthropoda, which statements are correct?
1. They have jointed appendages.
2. They have an open circulatory system.
3. They have a complete digestive system.
Explanation:
Arthropods have jointed appendages, an open circulatory system, and a complete digestive system.[file:42]
Q83. Regarding Mollusca, which statements are correct?
1. They have a mantle cavity.
2. They have a kidney.
3. They have a complete digestive system.
Explanation:
Molluscs have a mantle cavity, a kidney, and a complete digestive system.[file:42]
Q84. Regarding Echinodermata, which statements are correct?
1. They have a water vascular system.
2. They have a complete digestive system.
3. They have a kidney.
Explanation:
Echinoderms have a water vascular system and a complete digestive system, but no kidney.[file:42]
Q85. Regarding Hemichordata, which statements are correct?
1. They have a stomochord.
2. They have a proboscis gland.
3. They have a complete digestive system.
Explanation:
Hemichordates have a stomochord, a proboscis gland, and a complete digestive system.[file:42]
Q86. Regarding Chordata, which statements are correct?
1. They have a notochord.
2. They have a dorsal hollow nerve cord.
3. They have a complete digestive system.
Explanation:
Chordates have a notochord, a dorsal hollow nerve cord, and a complete digestive system.[file:42]
Q87. Regarding Porifera, which statements are correct?
1. They have choanocytes.
2. They have a complete digestive system.
3. They have a water transport system.
Explanation:
Porifera have choanocytes and a water transport system, but not a complete digestive system.[file:42]
Q88. Regarding Coelenterata, which statements are correct?
1. They have cnidoblasts.
2. They have a complete digestive system.
3. They have a water vascular system.
Explanation:
Coelenterata have cnidoblasts, but their digestive system is incomplete and they do not have a water vascular system.[file:42]
Q89. Regarding Ctenophora, which statements are correct?
1. They have comb plates.
2. They have a water vascular system.
3. They have a complete digestive system.
Explanation:
Ctenophora have comb plates and a complete digestive system, but not a water vascular system.[file:42]
Q90. Regarding Platyhelminthes, which statements are correct?
1. They have flame cells.
2. They have a complete digestive system.
3. They have a water vascular system.
Explanation:
Platyhelminthes have flame cells, but their digestive system is incomplete and they do not have a water vascular system.[file:42]
Q91. Regarding Aschelminthes, which statements are correct?
1. They have an excretory tube.
2. They have a complete digestive system.
3. They have a water vascular system.
Explanation:
Aschelminthes have an excretory tube and a complete digestive system, but not a water vascular system.[file:42]
Q92. Regarding Annelida, which statements are correct?
1. They have nephridia.
2. They have a closed circulatory system.
3. They have a water vascular system.
Explanation:
Annelids have nephridia and a closed circulatory system, but not a water vascular system.[file:42]
Q93. Regarding Arthropoda, which statements are correct?
1. They have jointed appendages.
2. They have an open circulatory system.
3. They have a water vascular system.
Explanation:
Arthropods have jointed appendages and an open circulatory system, but not a water vascular system.[file:42]
Q94. Regarding Mollusca, which statements are correct?
1. They have a mantle cavity.
2. They have a kidney.
3. They have a water vascular system.
Explanation:
Molluscs have a mantle cavity and a kidney, but not a water vascular system.[file:42]
Q95. Regarding Echinodermata, which statements are correct?
1. They have a water vascular system.
2. They have a complete digestive system.
3. They have a kidney.
Explanation:
Echinoderms have a water vascular system and a complete digestive system, but not a kidney.[file:42]
Q96. Regarding Hemichordata, which statements are correct?
1. They have a stomochord.
2. They have a proboscis gland.
3. They have a water vascular system.
Explanation:
Hemichordates have a stomochord and a proboscis gland, but not a water vascular system.[file:42]
Q97. Regarding Chordata, which statements are correct?
1. They have a notochord.
2. They have a dorsal hollow nerve cord.
3. They have a water vascular system.
Explanation:
Chordates have a notochord and a dorsal hollow nerve cord, but not a water vascular system.[file:42]
Q98. Regarding Porifera, which statements are correct?
1. They have choanocytes.
2. They have a water transport system.
3. They have a complete digestive system.
Explanation:
Porifera have choanocytes and a water transport system, but not a complete digestive system.[file:42]
Q99. Regarding Coelenterata, which statements are correct?
1. They have cnidoblasts.
2. They have a water vascular system.
3. They have a complete digestive system.
Explanation:
Coelenterata have cnidoblasts and an incomplete digestive system, but not a water vascular system.[file:42]
Q100. Regarding Ctenophora, which statements are correct?
1. They have comb plates.
2. They have a water vascular system.
3. They have a complete digestive system.
Explanation:
Ctenophora have comb plates. [file:42]
Score: 0.0
+2 for correct, −0.5 for wrong