Small unstable variations which fluctuate on either side of an average condition are known as

Assertion: Mutations are basically different from fluctuations. Reason: Mutations are sudden discontinuous and large variations, while fluctuations are small and continuous variations.

Small minute openings on either side of cockraoch body are

Sudden reappearance of certain ancestral chracters which had either disappeared or were reduced is known as

A forest in which people were allowed to stay on condition of free service was known as