When we talk of functional macromolecules (e.g.,proteins as enzymes,hormones,receptors,antibodies,etc.),towards what are they evolving?

Which one of the following organs has become vestigial in humans due to the consumption of cooked food over many years?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Forelimbs of humans and bats are homologous.
Reason $R$: Forelimbs of humans and bats have similar anatomical structure.
In the light of the above statements, choose the most appropriate answer from the options given below:

Wings of pigeon,mosquito,and bat show:

Connecting links are organisms that show characters of

The age of a rock is calculated on the basis of: