When the entire sole rests on the ground during walking as in case of a man, it is known as
Plantigrade
Digitigrade
Perikaryon
Hallux
Identify the vestigial organ in the given figure
Who concluded that existing living forms sharesimilarities to varying degrees not only among them selves but also with life forms that existed millions of years ago ?
Goldschmidt has classified evolution into micro, macro, and mega evolution. Which one of the following is referred to as micro-evolution
$A$ : Archaeopteryx had free caudal vertebrae and toothed beak with teeth like reptiles.
$R$ : It is missing link between reptiles and bird