Phylum Mollusca

Q. The muscular foot helps in locomotion in

1. annelids
2. arthropods
3. molluscs
4. echinoderms

Q. Which of the following is not a characteristic feature of molluscs?

1. Radial symmetry
2. Indirect development
3. Dioecious
4. Oviparous

Q. Molluscs have only two germ layers- the ectoderm and the endoderm.

1. False
2. True

Q. Which organism given below has a shell?

1. Cucumaria
2. Ophiura
3. Pinctada
4. Octopus

Q. Which among the following has a file-like rasping organ?

1. Earthworm
2. Cockroach
3. Snail
4. Tapeworm

Q. Radula of molluscs are helpful in

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

Q.

Devil fish is the common name of:

1. Sepia

2. Loligo

3. Octopus

4. Teredo

Q. The second-largest phylum in the animal kingdom is

1. Arthropoda
2. Annelida
3. Chordata
4. Mollusca

Q. Identify the animal from the following which lives on land.

1. Echinus
2. Balanoglossus
3. Antedon
4. Slug

Q.

The second largest phylum in Animal Kingdom is ___.

1. Arthropoda

2. Mollusca

3. Annelida

4. Cnidaria

Q.

Common examples of …………….are snail, slug and octopus.

Q.

Rasping organ in snail is

1. Aristotle’s lantern

2. Mandible

3. Radula

4. Ommatophore

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

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

Q. Presence of radula is a unique feature of

1. starfish
2. snail
3. sea lily
4. silverfish

Q. Phylum Mollusca is the second largest phylum after Phylum Arthropoda.

1. False
2. True

Q. Tusk shell is the common name of

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

Q. Select the members of Phylum Mollusca.

1. Snails
2. Crabs
3. Ants
4. Giant squid
5. Octopus
6. Cockroaches
7. Grasshopper
8. Oysters
9. Clams

Q. Radula in molluscs is

1. a rasping organ for feeding
2. the space between the hump and the mantle
3. a respiratory organ
4. none of the above

Q.

In which one of the following the following the genus name its tow characters and its phylum are not correctly matched, whereas the remaining three are correct

1. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Phylum}\\ \text{Asterias}& \text{(a) Spiny Skinned}& \text{Echinodermata}\\ & \text{(b) Water vascular System}& \end{array}$

2. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Phylum}\\ \text{Sycon}& \text{(a) Pore bearing}& \text{Porifera}\\ & \text{(b) canal system}& \end{array}$

3. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Phylum}\\ \text{Periplanata}& \text{(a) Jointed appendages}& \text{Arthropoda}\\ & \text{(b)Exoskeleton}& \end{array}$

4. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Phylum}\\ \text{Pilia}& \text{(a) Body segmented}& \text{Mollusca}\\ & \text{(b) Mouth with radula}& \end{array}$

Q. Molluscs are

1. schizocoelomates
2. pseudocoelomates
3. enterocoelomates
4. acoelomates

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 - b, 2 - c, 3 - d, 4 - a.

2. 1 - a, 2 - b, 3 - c, 4 - d.

3. 1 - c, 2 - a, 3 - d, 4 - b.

4. 1 - c, 2 - b, 3 - d, 4 - a.

Q. Which one of the following is exclusively found only in Mollusca?

1. Sensory tentacles
2. Operculum
3. Shell
4. Radula

Q.

Identify the wrong match:

1. Porifera – spicules

2. Ctenophora – bioluminescence

3. Mollusca – chitinous shell

4. Annelida – nephridia

Q. Identify the animal given in the image below.

1. Pearl oyster
2. Apple snail
3. Chiton
4. Clam