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

The eye of an octopus and the eye of a cat show different internal structures, yet they perform similar functions. This is an example of:

$A$ certain animal possesses shelled eggs,hair,and mammary glands,and also has a cloaca. It acts as a connecting link between which of the following?

'Ontogeny recapitulates phylogeny' is the brief definition of

Which of the given pairs are correct?
$I.$ Wings of insects and birds are homologous organs.
$II.$ Wings of bats and birds are homologous organs.
$III.$ Wings of insects and bats are analogous organs.
$IV.$ Wings of insects and birds are analogous organs.
Choose the correct option.

The ancestors of modern day frogs and salamanders are: