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:

Homology indicates $..........$.

Wings of bat, locust and pigeon are an example of

Which of the following is a connecting link between reptiles and birds?

Flippers of a seal are: