$A$ : Archaeopteryx had free caudal vertebrae and toothed beak with teeth like reptiles.
$R$ : It is missing link between reptiles and bird
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
The greatest evolutionary change enabling the land vertebrates to be completely free from the water. Habitat was the development of
Theory of abiogenesis or spontaneous generation was finally disapproved by
Darwin gave the theory of evolution was based on
Hugo de Vries studied mutations in
$H.C.\; Urey$ wrote the following book