Phylum Mollusca

Q. Which among the following groups of animals have only molluscs?

1. Crab, insects and spiders
2. Starfish, sea urchin, sea lily
3. Jellyfish, corals, sea pen
4. Snail, devil fish, oysters

Q.

I am a triploblastic invertebrate with a hard exoskeleton. I have an asymmetrical body plan, but many of my cousins are bilaterally symmetrical. I belong to the phylum

1. Annelida

2. Arthropoda

3. Echinodermata

4. Mollusca

Q.

Match the following structures in molluscs to their respective functions:

Column I Column II

1) Radula a) Blood pigment

2) Mantle layer b) Mastication

3) Foot c) Secretion of shell

4) Haemocyanin d) Locomotion

1. 1) ⇒a, 2)⇒b, 3)⇒c, 4)⇒d.

2. 1) ⇒c, 2)⇒a, 3)⇒d, 4)⇒b.

3. 1) ⇒c, 2)⇒b, 3)⇒d, 4)⇒a.

4. 1) ⇒b, 2)⇒c, 3)⇒d, 4)⇒a.

Q. Radula of molluscs are helpful in

1. locomotion
2. reproduction
3. feeding
4. respiration

Q.

Identify the wrong match:

1. Ctenophora – bio luminescence

2. Annelida – nephridia

3. Mollusca – chitinous shell

4. Porifera – spicules

Q. Which one of the following is a matching set of phylum and its three examples?

1. A
2. B
3. C
4. D

Q.

Select the wrong statement among the following given statements.

1. Bivalves are mostly used in commercial pearl production

2. Pila has radula and univalved shell

3. Cuttle fish and devil fish are true fishes

4. Clitellum is seen in earthworm

Q.

Rasping organ in snail is

1. Radula

2. Ommatophore

3. Aristotle’s lantern

4. Mandible

Q.

The second largest phylum in Animal Kingdom is ___.

1. Arthropoda

2. Mollusca

3. Annelida

4. Cnidaria

Q. Tusk shell is the common name of

1. Chiton
2. Dentalium
3. Aplysia
4. Sepia