1. Which of the following phyla does not belong to the invertebrates?
A) Arthropoda
B) Chordata
C) Mollusca
D) Porifera
Answer: B) Chordata
2. In which phylum would you classify animals with jointed legs and an exoskeleton?
A) Mollusca
B) Annelida
C) Arthropoda
D) Cnidaria
Answer: C) Arthropoda
3. What is the main distinguishing feature of animals in the phylum Porifera?
A) Presence of a true coelom
B) Radial symmetry
C) Absence of tissues and organs
D) Bilateral symmetry
Answer: C) Absence of tissues and organs
4. Which of the following is not a characteristic of animals in the phylum Cnidaria?
A) Radial symmetry
B) Presence of tentacles with stinging cells
C) Bilateral symmetry
D) Two tissue layers (diploblastic)
Answer: C) Bilateral symmetry
5. Which of the following invertebrates is known for its ability to regenerate lost body parts?
A) Earthworm
B) Flatworm
C) Sea star
D) Octopus
Answer: C) Sea star
6. Annelids are characterized by the presence of:
A) Jointed appendages
B) Segmented bodies
C) A hard external shell
D) A fluid-filled body cavity
Answer: B) Segmented bodies
7. Which of the following phyla includes animals with a soft body, often protected by a hard shell?
A) Porifera
B) Nematoda
C) Mollusca
D) Platyhelminthes
Answer: C) Mollusca
8. Which of the following invertebrates is known for its role in soil aeration and improvement?
A) Earthworm
B) Sea urchin
C) Jellyfish
D) Snail
Answer: A) Earthworm
9. The water vascular system is a unique feature found in which group of invertebrates?
A) Mollusks
B) Arthropods
C) Echinoderms
D) Cnidarians
Answer: C) Echinoderms
10. Which phylum of invertebrates includes animals with a notochord and a dorsal nerve cord?
A) Annelida
B) Mollusca
C) Chordata
D) Nematoda
Answer: C) Chordata
11. Which of the following is not a characteristic of arachnids?
A) Eight legs
B) Two body segments: cephalothorax and abdomen
C) Presence of wings
D) Presence of chelicerae (fangs)
Answer: C) Presence of wings
12. Which invertebrate phylum includes animals with a true coelom and a well-developed circulatory system?
A) Porifera
B) Nematoda
C) Arthropoda
D) Annelida
Answer: D) Annelida
13. The exoskeleton of arthropods is primarily composed of:
A) Chitin
B) Calcium carbonate
C) Keratin
D) Silica
Answer: A) Chitin
14. What is the name of the larval stage of a butterfly?
A) Larva
B) Nymph
C) Pupa
D) Caterpillar
Answer: D) Caterpillar
15. Which of the following invertebrates is capable of producing silk?
A) Earthworm
B) Beetle
C) Spider
D) Millipede
Answer: C) Spider
16. Which of the following is not a class of mollusks?
A) Gastropoda
B) Bivalvia
C) Crustacea
D) Cephalopoda
Answer: C) Crustacea
17. What is the function of the siphuncle in cephalopods?
A) Digestion
B) Reproduction
C) Jet propulsion
D) Buoyancy control
Answer: D) Buoyancy control
18. Which of the following is not a type of symmetry found in animals?
A) Bilateral
B) Radial
C) Asymmetrical
D) Pentaradial
Answer: D) Pentaradial
19. Which phylum includes animals with a crown of cilia used for feeding?
A) Porifera
B) Cnidaria
C) Rotifera
D) Platyhelminthes
Answer: C) Rotifera
20. The larval form of a cnidarian is called:
A) Planula
B) Trochophore
C) Medusa
D) Polyp
Answer: A) Planula
21. In which group of invertebrates would you find animals with jointed appendages and a segmented body?
A) Annelida
B) Arthropoda
C) Mollusca
D) Nematoda
Answer: B) Arthropoda
22. Which of the following is not a characteristic of echinoderms?
A) Radial symmetry
B) Endoskeleton made of calcium carbonate plates
C) Water vascular system
D) Bilateral symmetry
Answer: D) Bilateral symmetry
23. Which invertebrate phylum includes animals that have a complete digestive system with a mouth and anus?
A) Porifera
B) Platyhelminthes
C) Nematoda
D) Cnidaria
Answer: C) Nematoda
24. What is the name of the stinging cells found in cnidarians?
A) Nematocysts
B) Radula
C) Siphuncle
D) Cnidocytes
Answer: D) Cnidocytes
25. Which of the following is not a class of arthropods?
A) Arachnida
B) Insecta
C) Crustacea
D) Gastropoda
Answer: D) Gastropoda
26. The phylum Porifera is also known as:
A) Sponges
B) Corals
C) Jellyfish
D) Flatworms
Answer: A) Sponges
27. Which of the following is not a characteristic of flatworms (phylum Platyhelminthes)?
A) Bilateral symmetry
B) Presence of a digestive cavity with one opening
C) Cephalization
D) Segmented body
Answer: D) Segmented body
28. Which invertebrate phylum includes animals with a pseudocoelom and a protective cuticle?
A) Porifera
B) Nematoda
C) Cnidaria
D) Annelida
Answer: B) Nematoda
29. What is the function of the excretory system in invertebrates?
A) Regulation of body temperature
B) Removal of waste products from the body
C) Production of gametes
D) Digestion of food
Answer: B) Removal of waste products from the body
30. Which of the following is not a class of echinoderms?
A) Asteroidea
B) Ophiuroidea
C) Echinoidea
D) Gastropoda
Answer: D) Gastropoda
31. The phylum Arthropoda is characterized by the presence of:
A) Jointed appendages and a segmented body
B) A mantle and a radula
C) A water vascular system
D) Stinging cells and tentacles
Answer: A) Jointed appendages and a segmented body
32. What is the main function of the water vascular system in echinoderms?
A) Respiration
B) Circulation
C) Reproduction
D) Locomotion
Answer: D) Locomotion
33. Which invertebrate phylum includes animals with a complete digestive system and a muscular foot?
A) Nematoda
B) Cnidaria
C) Mollusca
D) Platyhelminthes
Answer: C) Mollusca
34. Which of the following is not a class of mollusks?
A) Gastropoda
B) Bivalvia
C) Cephalopoda
D) Arachnida
Answer: D) Arachnida
35. Which invertebrate phylum includes animals with a true coelom and a closed circulatory system?
A) Cnidaria
B) Platyhelminthes
C) Annelida
D) Porifera
Answer: C) Annelida
36. Which of the following invertebrate phyla includes animals with a segmented body and jointed appendages?
A) Porifera
B) Nematoda
C) Arthropoda
D) Cnidaria
Answer: C) Arthropoda
37. The presence of a radula is a characteristic feature of which invertebrate phylum?
A) Platyhelminthes
B) Nematoda
C) Mollusca
D) Cnidaria
Answer: C) Mollusca
38. What is the function of the madreporite in echinoderms?
A) Digestion
B) Reproduction
C) Water filtration
D) Gas exchange
Answer: C) Water filtration
39. Which of the following is not a class of echinoderms?
A) Asteroidea
B) Ophiuroidea
C) Crustacea
D) Echinoidea
Answer: C) Crustacea
40. What is the main function of the exoskeleton in arthropods?
A) Protection and support
B) Gas exchange
C) Sensory perception
D) Reproduction
Answer: A) Protection and support
41. Which invertebrate phylum includes animals with a gastrovascular cavity and tentacles armed with cnidocytes?
A) Platyhelminthes
B) Nematoda
C) Cnidaria
D) Annelida
Answer: C) Cnidaria
42. The larval stage of a frog is called a:
A) Planula
B) Trochophore
C) Tadpole
D) Nymph
Answer: C) Tadpole
43. Which of the following is not a class of mollusks?
A) Gastropoda
B) Bivalvia
C) Cephalopoda
D) Arachnida
Answer: D) Arachnida
44. What is the function of the tube feet in echinoderms?
A) Feeding
B) Locomotion
C) Gas exchange
D) Sensory perception
Answer: B) Locomotion
45. Which invertebrate phylum includes animals with a segmented body and jointed appendages?
A) Annelida
B) Arthropoda
C) Mollusca
D) Nematoda
Answer: B) Arthropoda
46. The phylum Porifera is also known as:
A) Sponges
B) Corals
C) Jellyfish
D) Flatworms
Answer: A) Sponges
47. Which invertebrate phylum includes animals with a pseudocoelom and a protective cuticle?
A) Porifera
B) Nematoda
C) Cnidaria
D) Annelida
Answer: B) Nematoda