The field in which zoology and geology are very intimately connected is:

The forelimbs of a cat and a lizard are used for walking. The forelimb of a whale is used for swimming,and the forelimb of a bat is used for flying. These are examples of:

Fossils are formed where...

Which of the following is a vestigial organ in humans?

Which of the following provides the most direct evidence for evolution?

$A$: Archaeopteryx had free caudal vertebrae and a toothed beak with teeth like reptiles.
$R$: It is a missing link between reptiles and birds.