MCQ on Mollusca

MCQ on Mollusca; can help students evaluate their knowledge of Phylum mollusca. Answers are also given for MCQ on Mollusca to help you remember. Try our MCQ on Mollusca to see if you can get all the answers right for the questions below.

MCQ on Mollusca

Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms.

MCQ on Mollusca

1. Octopus is a member of a class ?

a. Mollusca

b. Pelecypoda

c. Cephalopoda

d. None of the above

2. Which of the following statements about Unio is true?

a. Unio has a one chambered heart

b. Unio has a two-chambered heart

c. Unio has a three-chambered heart

d. None of the above

3. Most molluscs are of __________.

a. Marine Habitats

b. Terrestrial Habitats

c. Freshwater Habitats

d. All of the above

4. Which of the following is not a member of the phylum Mollusca?

a. Sea Hare

b. Sea mica

c. Sea lemon

d. Sea feather

5. Which of the following does not belong to phylum Mollusca?

a. Decapoda

b. Gastropoda

c. Cephalopoda

d. All of the above

6. Which of the following invertebrates is the largest?

a. Architeuthis

b. Sepia

c. Loligo

d. Octopus

7. The most advanced mollusks are classified as?

a. Amphineura

b. Cephalopoda

c. Gastropoda

d. Monopacophora

8. What is a devilfish’s common name?

a. Loligo

b. Sepia

c. Teredo

d. Octopus

9. Which of the following is referred to as the “Pearl Mother Layer?”

a. Nacre

b. Mantle

c. Periostracum

d. Prismatic layer

10. Which of the following includes coelomate unsegmented organisms?

a. Annelida

b. Molusca

c. Chordata

d. Arthropoda

11. Internal shell is present in?

a. Pila

b. Sepia

c. Chiron

d. Lamellidens

12. Identify the larva, which is only found in gastropods?

a. Trochophore

b. Veliger

c. Glochidium

d. Muller’s larva

13. Osphradium is to test the purity of water in?

a. Pila

b. Starfish

c. Housefly

d. Earthworm

14. A freshwater mussel’s respiratory organs are?

a. Book lungs

b. Pulmonary sacs

c. Gills

d. Respiratory siphons

15. Sepia is commonly known as?

a. Star fish

b. Jelly fish

c. Cuttle fish

d. Silver fish

Answer Key

MCQ on Mollusca

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