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