The Recapitulation theory provides evidence from which of the following fields?

Wings of pigeon,mosquito,and bat show:

What is the study of the history of life forms on Earth called?

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:

Most primitive living mammals,which provide evidence of organic evolution from geographical distribution,are found in:

The diagram given below indicates: