NEET : Multiple Choice questions: Phylum Mollusca

1. Consider the following sentences and select the number of  correct statements.

1. Mollusca is the second largest phylum of Animals after the arthropods.

2.   Molluscan are  found in  fresh and marine water but some are terrestrial.

3. Body of  Molluscan is covered by a Chitin.
4. Molluscan are Coelomate. 

5. Molluscan  are triploblastic with organ system  level of organisation.

A. Two           B. Three

C. Four           D. Five

Answer : C Explanation 

2. Body of Molluscan animal is covered by the 

A. Glucosamine 

B. Chitin 

C. Calcareous ossicles 

D. Calcareous Shell 

Answer : D Explanation

3. Body of Molluscan is divided into 

A. Proboscis, Collar and trunk

B. Head , neck and Trunk

C. Head, Muscular foot and visceral hump.

D. Head. Thorax and abdomen.

Answer : C Explanation

 

4. Visceral hump is covered by the mantle which is 

A. Soft and spiny skin

B. Hard and spiny skin

C. Soft and spongy skin

D. Hard and spongy skin

Answer: C Explanation

5. Which of the following statement is not correct.

A. The space between the hump and the mantle is called the mantle cavity.

B. A soft and spongy layer of skin forms a mantle over the visceral hump. 

C. Gills are only  respiratory in  function in Mollusc.

D. Feather like gills are present inside the mantle cavity.

Answer: C Explanation

6. In Mollusc, Gills are involved in 

A. Respiration only

B. Excretion only

C. Respiration and Excretion

D. Respiration , Excretion and Reproduction 

Answer : C Explanation

7. Gills are enclosed in mantle cavity which is space between 

A. Muscular foot and mantle

B. Visceral hump and mantle

C.Muscular foot and Visceral hump.

D. Calcareous shell and mantle

Answer : B Explanation

8.The mouth of mollusc contains a file-like rasping organ for feeding called A.Radula

B.Muscular pharynx

C.Ctenidia

D.labrum

Answer : A Explanation

9. Consider the following sentences and select the number of  correct statements.

1. Mostly Molluscan are oviparous, they lay eggs.

2. Molluscan have tentacles on anterior head.

3. Saxes are separated in Molluscan. 
4. Development is indirect in Mollusca.

A. Two           B. Three

C. Four           D. One

Answer : C Explanation 

10. Which of the following Mollusca is called as Pearl oyster.

A. Pinctada     B. Aplysia

C. Dentalium   D. Chiton

Answer : A Explanation

11. Which of the following pair is  not correctly matched.

A. Aplysia : Sea mouse

B. Dentalium: Tusk shell

C. Pila : Apple Snail

D. Loligo : Squid

Answer : A Explanation

12. Match the list

A. Aplysia   1. Sea hare

B. Octopus 2.Cuttle fish

C. Sepia     3. Devil fish

D. Chiton    4. Sea mouse

     A      B       C      D

A.  1       2       3       4

B.  1       3       2       4

C.  4      3       2        1

D.  4       2       3       1

Answer: B Explanation

13. Identify the animal of Mollusca in given Diagram

A. Unio          B. Pila

C. Pinctada   D. Chiton

Answer : B