Which bird possesses teeth in its beak?

Homologous organs are

Homologous organs are .......

The embryological support for evolution was proposed by which scientist?

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.

$Archaeopteryx$,a transitional fossil between birds and reptiles,was discovered from the rocks of which of the following periods?