The presence of gill slits in the embryos of all vertebrates supports the theory of

Identify the correct pair.

What is the study of fossils called?

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:

Age of fossils in the past was generally determined by the radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods,which were used recently and led to the revision of the evolutionary periods for different groups of organisms,include:

Fossil contents of the alimentary canal are termed as