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Assertion (A) It is necessary to study l...

Assertion (A) It is necessary to study life history of an ascidian to consider it as chordate
Reason (R) Tadpole larva of ascidians have a notochord that disappears in the adult

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true but R is not the correct explanation of A

C

A is true but R is false

D

A is false but R is true

Text Solution

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The correct Answer is:
A
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Assertion:Frog's tadpole has fish-like form, tail and gills Reason: Tadpole stage is the recapitulation of the fish-like ancestor of frog in the latter's life history

[A] : The Ascidian tadpole larva possess all the basic chordate characters. [R] : Both urochordates and other chordates have originated from a common ancestor .