Animal Diversity — MCQs Biology 50 min Score: 0 Attempted: 0/50 Subscribe 1. Animal diversity refers to: (A) Variety of animal species (B) Only vertebrates (C) Only mammals (D) Only aquatic animals 2. Porifera are: (A) Earthworms (B) Jellyfish (C) Sponges (D) Snails 3. Coelenterates include: (A) Insects only (B) Sponges only (C) Worms only (D) Jellyfish, Hydra, and Coral 4. Platyhelminthes are: (A) Segmented worms (B) Roundworms (C) Flatworms (D) Arthropods 5. Nematodes are: (A) Segmented worms (B) Flatworms (C) Roundworms (D) Mollusks 6. Annelids include: (A) Earthworms, leeches, polychaetes (B) Sponges only (C) Insects (D) Crustaceans 7. Mollusca includes: (A) Earthworms (B) Snails, Clams, Octopus (C) Sponges (D) Starfish 8. Arthropods are characterized by: (A) Soft unsegmented body (B) Jointed appendages and exoskeleton (C) Radial symmetry (D) No segmentation 9. Echinoderms include: (A) Starfish, Sea urchins, Sea cucumbers (B) Snails (C) Earthworms (D) Sponges 10. Chordates are characterized by: (A) Notochord, dorsal hollow nerve cord, pharyngeal slits (B) Radial symmetry (C) Segmentation only (D) Exoskeleton only 11. Vertebrates belong to phylum: (A) Chordata (B) Arthropoda (C) Mollusca (D) Echinodermata 12. Invertebrates are: (A) Only marine animals (B) Animals with backbone (C) Animals without backbone (D) Only terrestrial animals 13. Hydra exhibits: (A) Spherical symmetry (B) Bilateral symmetry (C) Asymmetry (D) Radial symmetry 14. Sponges exhibit: (A) Radial symmetry (B) Asymmetry (C) Bilateral symmetry (D) Spherical symmetry 15. Starfish exhibits: (A) Asymmetry (B) Bilateral symmetry (C) Pentamerous radial symmetry (D) Spherical symmetry 16. Earthworm belongs to phylum: (A) Chordata (B) Mollusca (C) Arthropoda (D) Annelida 17. Octopus belongs to class: (A) Cephalopoda (B) Gastropoda (C) Bivalvia (D) Polychaeta 18. Snails belong to class: (A) Gastropoda (B) Cephalopoda (C) Bivalvia (D) Polychaeta 19. Crabs belong to class: (A) Crustacea (B) Insecta (C) Arachnida (D) Myriapoda 20. Spiders belong to class: (A) Crustacea (B) Insecta (C) Arachnida (D) Myriapoda 21. Centipedes belong to class: (A) Diplopoda (B) Chilopoda (C) Insecta (D) Arachnida 22. Millipedes belong to class: (A) Arachnida (B) Chilopoda (C) Insecta (D) Diplopoda 23. Insects have: (A) No legs (B) Four pairs of legs (C) Many legs (D) Three pairs of legs 24. Fish belong to class: (A) Amphibia (B) Pisces (C) Reptilia (D) Mammalia 25. Amphibians include: (A) Birds (B) Snakes and Lizards (C) Frogs, Salamanders (D) Mammals 26. Reptiles include: (A) Mammals only (B) Frogs only (C) Birds only (D) Snakes, Lizards, Crocodiles, Turtles 27. Birds are: (A) Fish (B) Ectothermic (C) Amphibians (D) Endothermic with feathers 28. Mammals are: (A) Amphibians only (B) Fish only (C) Endothermic with hair and mammary glands (D) Reptiles only 29. Sharks have: (A) Bony skeleton (B) Cartilaginous skeleton (C) No skeleton (D) Exoskeleton 30. Bony fishes have: (A) No skeleton (B) Cartilaginous skeleton (C) Exoskeleton (D) Ossified skeleton 31. Amphibians undergo: (A) Metamorphosis (B) Direct development only (C) Viviparity (D) Budding 32. Crocodiles have: (A) Two-chambered heart (B) Three-chambered heart (C) Four-chambered heart (D) No heart 33. Birds have: (A) Four-chambered heart (B) Three-chambered heart (C) Two-chambered heart (D) No heart 34. Mammals have: (A) Three-chambered heart (B) Four-chambered heart (C) Two-chambered heart (D) Five-chambered heart 35. Vertebrates are: (A) Pseudocoelomate animals (B) Acoelomate animals (C) Coelomate animals (D) Sponges only 36. Vertebrates possess: (A) Endoskeleton (B) Exoskeleton (C) No skeleton (D) Only cartilage 37. Fish heart is: (A) Three-chambered (B) Two-chambered (C) Four-chambered (D) Five-chambered 38. Amphibian heart is: (A) Two-chambered (B) Three-chambered (C) Four-chambered (D) One-chambered 39. Reptile heart is: (A) Four-chambered (B) Two-chambered (C) Three-chambered (except crocodiles) (D) One-chambered 40. Fertilization in fish and amphibians is usually: (A) Budding (B) Internal (C) External (D) Parthenogenesis 41. Fertilization in reptiles, birds, and mammals is: (A) Budding (B) External (C) Internal (D) Parthenogenesis 42. Vertebrates show: (A) Cephalization (B) No cephalization (C) Random nerve distribution (D) Nerve net only 43. Vertebrates have: (A) Dorsal hollow nerve cord (B) Ventral solid nerve cord (C) Lateral nerve cord (D) No nerve cord 44. Vertebrates reproduce: (A) Fragmentation (B) Asexually (C) Budding (D) Sexually 45. Vertebrate respiration occurs mainly through: (A) Air sacs only (B) Skin only (C) Spiracles only (D) Lungs or gills 46. Vertebrate excretion is through: (A) Cloaca only (B) Skin only (C) Kidneys (D) Gills only 47. Vertebrate body cavity is: (A) Acoelom (B) Pseudocoelom (C) True coelom (D) None 48. Vertebrates are important because they: (A) Form higher trophic levels and maintain ecosystems (B) Only produce timber (C) Only eat plants (D) Only produce fiber 49. Endothermic vertebrates include: (A) Reptiles only (B) Birds and mammals (C) Amphibians only (D) Fish only 50. Ectothermic vertebrates include: (A) Mammals only (B) Birds only (C) Fish, amphibians, and reptiles (D) None