Invertebrate Zoology — MCQs Biology 50 min Score: 0 Attempted: 0/50 Subscribe 1. Invertebrates are animals: (A) With backbone (B) Without backbone (C) Microscopic only (D) Aquatic only 2. Sponges belong to the phylum: (A) Annelida (B) Cnidaria (C) Porifera (D) Mollusca 3. Cnidarians include: (A) Snails (B) Earthworms (C) Jellyfish, Hydra, and Coral (D) Insects 4. The body symmetry of sponges is: (A) Radial (B) Asymmetrical (C) Bilateral (D) Spherical 5. Hydra exhibits: (A) Radial symmetry (B) Bilateral symmetry (C) Asymmetry (D) Spherical symmetry 6. Nematodes are: (A) Flatworms (B) Roundworms (C) Segmented worms (D) Mollusks 7. Annelids have: (A) Segmented bodies (B) Unsegmented bodies (C) Exoskeleton (D) Radial symmetry 8. Mollusks include: (A) Hydra (B) Sponges (C) Snails, Octopus, Clams (D) Earthworms 9. Arthropods are characterized by: (A) Segmented worms (B) Jointed appendages and exoskeleton (C) Radial symmetry (D) Soft unsegmented body 10. Starfish belongs to the phylum: (A) Annelida (B) Mollusca (C) Echinodermata (D) Arthropoda 11. Spicules in sponges are for: (A) Digestion (B) Reproduction (C) Support and protection (D) Locomotion 12. Choanocytes in sponges function in: (A) Water circulation and feeding (B) Reproduction (C) Locomotion (D) Protection 13. Cnidocytes are characteristic of: (A) Cnidarians (B) Porifera (C) Annelida (D) Mollusca 14. Flatworms belong to: (A) Arthropoda (B) Nematoda (C) Annelida (D) Platyhelminthes 15. Earthworm is an example of: (A) Porifera (B) Arthropoda (C) Mollusca (D) Annelida 16. Octopus belongs to the class: (A) Polychaeta (B) Gastropoda (C) Bivalvia (D) Cephalopoda 17. Snails belong to the class: (A) Insecta (B) Cephalopoda (C) Bivalvia (D) Gastropoda 18. Clams belong to the class: (A) Gastropoda (B) Cephalopoda (C) Bivalvia (D) Polychaeta 19. Crustaceans include: (A) Crab, Lobster, Shrimp (B) Butterfly (C) Earthworm (D) Octopus 20. Insects have: (A) No legs (B) Four pairs of legs (C) Three pairs of legs (D) Many legs 21. Spiders belong to class: (A) Arachnida (B) Insecta (C) Crustacea (D) Myriapoda 22. Centipedes belong to class: (A) Chilopoda (B) Diplopoda (C) Arachnida (D) Insecta 23. Millipedes belong to class: (A) Arachnida (B) Chilopoda (C) Insecta (D) Diplopoda 24. Starfish exhibits: (A) Asymmetry (B) Bilateral symmetry (C) Pentamerous radial symmetry (D) Spherical symmetry 25. Water vascular system is characteristic of: (A) Mollusks (B) Echinoderms (C) Annelids (D) Arthropods 26. Tube feet of starfish function in: (A) Locomotion and food capture (B) Reproduction (C) Digestion (D) Protection 27. Nematodes are: (A) Flatworms (B) Segmented worms (C) Unsegmented, cylindrical worms (D) Roundworms with jointed appendages 28. Earthworm circulatory system is: (A) Open (B) Closed (C) Absent (D) Partially open 29. Mollusks have: (A) Soft body with muscular foot (B) Jointed legs (C) Segmented body (D) Radial symmetry 30. Octopus shows: (A) Exoskeleton (B) Segmentation (C) Cephalization and tentacles (D) Water vascular system 31. Arthropods have: (A) Water vascular system (B) Endoskeleton (C) Soft body (D) Exoskeleton made of chitin 32. Lobster and crab are: (A) Myriapods (B) Arachnids (C) Insects (D) Crustaceans 33. Echinoderms are exclusively: (A) Terrestrial (B) Freshwater (C) Marine (D) Amphibious 34. Coral forms: (A) Siliceous spicules (B) Chitinous shell (C) Calcium carbonate skeleton (D) Soft body only 35. Hydra reproduces by: (A) Binary fission (B) Budding (C) Spore formation (D) Fragmentation 36. Sponges are: (A) Free swimming (B) Sessile filter feeders (C) Parasitic (D) Predatory 37. Ascaris is a: (A) Flatworm (B) Roundworm (C) Segmented worm (D) Arthropod 38. Fasciola is a: (A) Mollusk (B) Roundworm (C) Earthworm (D) Liver fluke (Platyhelminth) 39. Tapeworm belongs to class: (A) Polychaeta (B) Trematoda (C) Cestoda (D) Gastropoda 40. Liver fluke belongs to class: (A) Polychaeta (B) Cestoda (C) Trematoda (D) Gastropoda 41. Rotifers are: (A) Microscopic aquatic animals (B) Insects (C) Arthropods (D) Mollusks 42. Annelids show: (A) No segmentation (B) Radial symmetry (C) Segmentation (metamerism) (D) Asymmetry 43. Polychaetes are: (A) Mollusks (B) Freshwater worms only (C) Roundworms (D) Marine annelids with parapodia 44. Earthworm is useful in: (A) Food only (B) Soil aeration and nutrient recycling (C) Medicinal purposes only (D) Timber production 45. Octopus has: (A) Closed circulatory system (B) Open circulatory system (C) Water vascular system (D) No circulatory system 46. Arthropods molt to: (A) Breathe (B) Grow (ecdysis) (C) Reproduce (D) Digest food 47. Insects undergo: (A) Water vascular movement (B) Segmentation (C) Metamorphosis (D) Budding 48. Crustaceans have: (A) Three pairs of antennae (B) One pair of antennae (C) No antennae (D) Two pairs of antennae 49. Sea urchin belongs to: (A) Mollusca (B) Arthropoda (C) Echinodermata (D) Annelida 50. Invertebrates are important because they: (A) Only eat plants (B) Produce timber only (C) Produce rubber only (D) Form the base of food chains and maintain ecosystems