Structure of Typical Molluscan 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

Q. Feather like gills are present in the _______ of molluscs.

1. mantle cavity
2. visceral hump
3. head
4. foot

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. 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. Shell in a mollusc is

1. chitinous and secreted by the mantle
2. calcareous and secreted by visceral mass
3. calcareous and secreted by the mantle
4. siliceous and secreted by the mantle

Q.

Mention any six characteristics of phylum hemichordata.

Q.

Where is radula found?

Q. Shell in a mollusc is

1. chitinous and secreted by the mantle
2. calcareous and secreted by visceral mass
3. calcareous and secreted by the mantle
4. siliceous and secreted by the mantle

Q.

Identify the stinging cells abundant in the tentacles of the hydra.

1. Ctenidia

2. Cnidoblasts

3. Ostia

4. Ganglia

Q. Which of the following are true about Mollusca?

1. Triploblastic and radial symmetry
2. Bilateral symmetry and calcareous shell
3. Radula and diploblastic
4. Calcareous shell and radial symmetry

Q. A fold of dorsal body wall which covers the visceral mass in molluscs, is called

1. operculum
2. mantle
3. shell
4. none of these

Q.

The shell in molluscs is secreted by

1. Foot

2. Gill

3. Mantle

4. Operculum

Q.

Is radula an organ?

Q. Mantle cavity in molluscs is present

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

Q. Fill in the blanks.
Soft-bodied animals belong to phylum ______.

Q. Feather like gills are present in the _______ of molluscs.

1. head
2. mantle cavity
3. visceral hump
4. foot

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. Fill in the blanks.
A _________ is present on the dorsal side of the foot in snail.

Q. Match the parts of molluscs to their functions.

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

Q. Which of the following is correct about phylum Mollusca?

1. Triploblastic, acoelomate
2. Triploblastic, coelomate
3. Diploblastic, acoelomate
4. Diploblastic, coelomate

Q. Phylum Mollusca can be distinguished from other invertebrates by the presence of

1. Bilateral symmetry and exoskeleton
2. A mantle and gills
3. Shell and segmented body
4. A mantle and non-segmented body

Q. Visceral mass occurs in Phylum

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

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.

Internal shell is present in:

1. Pila

2. Sepia

3. Chiron

4. Lamellidens

Q. Visceral mass occurs in Phylum

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

Q. In some animal groups, the body is found divided into compartments with at least some organs repeated. This characteristic feature is named?

1. Segmentation
2. Metametism
3. Metagenesis
4. Metamorphosis

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

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

Q. A fold of dorsal body wall which covers the visceral mass in molluscs is called

1. operculum
2. mantle
3. shell
4. none of these

Q.

A _______is present on the dorsal side of the foot in the snail.