The presence of gills in the tadpole of a frog indicates that:

Choose the correct statements with reference to organic evolution.
$I.$ Flippers of whale and wings of bat exhibit analogy.
$II.$ Wings of butterfly and wings of bird exhibit homology.
$III.$ Organs with dissimilar structure are called analogous organs.
$IV.$ Organs with similar structure and origin are called homologous organs.

Describe various biochemical or molecular evidences of evolution.

Provide definitions or explanations for the following: $1$. Recapitulation theory (Biogenetic law) and $2$. Palaeontology.

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

Wings of pigeon,mosquito,and bat show: