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Platyhelminthes

Assertion :Gl...

Question

Assertion :Glochidium larva rapidly disperse to a great distance. Reason: Glochidium is parasitic on fish.

A

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

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B

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

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C

If the assertion is true but the reason is false

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D

If both the assertion and reason are false

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Solution

The correct option is C If the assertion is true but the reason is false
The life cycle of fresh water mussel includes a larval phase called the Glochidium larva
These larvae attach themselves to the gills of fishes to get distributed to longer distances
They are not parasitic as they do not derive any nutrition from the fish
However, if a large number of larvae get attached to the gills, the gill tissue may undergo degeneration and lose its function
So, the correct answer is C 'If the assertion is true but the reason is false'

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