In $1938$,a fish caught in .......... was thought to be extinct,but it was a Coelacanth.

$A$: Similarities in proteins and genes performing a given function among diverse organisms give clues to common ancestry.
$R$: All groups of vertebrates arise from a common ancestor with great adaptation capability.

Describe various biochemical or molecular evidences of evolution.

Which set includes only analogous organs?

Who noted that embryos never pass through the adult stages of other animals?

Based on Haeckel's observations,during which stage are certain features common to all vertebrates?