Question

Assertion-Evolution is impossible without variations
Reason-Only useful variations are transmitted to the next generation.​

Answer 1

Answer:

It is really impossible

Explanation:

Answer 2

Both the assertion and reasoning are correct. Evolution means making oneself adapt to changes in external environment.

* Variations come to a living body when the external environment changes due to some reason or the other. It is due to these variations that living bodies try to adapt and survive.

* The variations which really help the living being adapt to the changes, are transmitted to the next generations.

* So both the assertion and its reason are logically correct.