Structure of Typical Molluscan Body

Q.

Why is peripatus said to be connecting link between Annelida and Arthropoda?

Q.

A mollusc is not a suitable animal to observe:

1. Muscular foot

2. Visceral mass

3. Head

4. Segmentation

Q. is an organ present in the mouth of molluscs for rasping.

1. Mantle
2. Radula
3. Hump
4. Malpighian tubules

Q. A land snail, a clam, and an octopus all share:

1. distinct cephalization
2. a mantle
3. embryonic torsion
4. a radula

Q. Which part of the body of molluscs possesses visceral hump?

1. Dorsal side of the foot
2. Mantle cavity
3. Ventral side of foot
4. Both A and B

Q. A molluscan with calcareous spicules is

1. Lepidopleurus
2. Doris
3. Neopilina
4. Chaetoderma

Q. Write two important characteristics of Mollusca.

Q. Widely found metallic element in molluscs is

1. Potassium
2. Sodium
3. Calcium
4. All of the above

Q. Which of the following characteristics is true about molluscan?

1. The presence of metameric sgmentation
2. The presence of chitinous exoskeleton
3. The presence of tissue level of organisation
4. The presence of mantle cavity and coelom cavity

Q. Organisms belonging to phylum Mollusca are ........... and have bilateral symmetry.

1. Diplobastic
2. No germ layer
3. Triploblastic
4. None of the above

Q. Pallium of molluscs is __________.

1. Thin, non-muscular, non-vascular and glandular
2. Thick, non-muscular, non-vascular and glandular
3. Thick, muscular, non-vascular and non-glandular
4. Thick, muscular, non-vascular and glandular