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Assertion:In molluscs, feather-like gill...

Assertion:In molluscs, feather-like gills are present in mantle cavity.
Reason: These gills have respiratory and excretory functions.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
b
In molluscs, the space between the mantle and the hump is called mantle cavity in which feather-like gills are present. They have both respiratory and excretory functions.
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Fill up the blank spaces in the tabe below by selecting the correct option. {:("Phylum/Class","Excretory organ","Circulatory system","Respiratory organ"),("Arthropoda",A,B,"Lungs/Gills/Tracheal system"),(C,"Nephridia","Closed","Skin"),(D,"Methanephridia","Open",E):}