Structure of Typical Molluscan Body

Q. Mantle cavity in molluscs is present

1. between the foot and viscera
2. between the mantle and viscera
3. between the mantle and shell
4. between the head and foot

Q. Visceral mass occurs in Phylum

1. Mollusca
2. Echinodermata
3. All the above
4. Arthropoda

Q.

The shell in molluscs is secreted by

1. Foot

2. Gill

3. Pallium

4. Operculum

Q.

A mollusc is not a suitable animal to observe which of the following features?

1. Head

2. Muscular foot

3. Visceral mass

4. Segmentation

Q.

Internal shell is present in:

1. Pila

2. Sepia

3. Chiron

4. Lamellidens

Q. Match the parts of molluscs to their functions.

1. Internal transport
2. Mastication
3. Secretion of shells
4. Locomotion

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

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

Q. Which among the following is incorrect with respect to molluscs?

1. All have a soft segmented body which is differentiated into head, foot and visceral mass
2. The visceral mass is covered by a mantle
3. Open type of blood vascular system is seen
4. Molluscs are coelomates

Q. Molluscs differ from annelids in

1. having a closed circulatory system
2. having direct development
3. having segmented body
4. having unsegmented body

Q. The unsegmented animals belong to the phyla

1. Annelida and Aschelminthes
2. Mollusca and Annelida
3. Aschelminthes and Mollusca
4. Arthropoda and Aschelminthes