What is the study of fossils called? Mention any three points on how the fossils throw light on past life.

(a) How does the study of fossils help to understand evolution.

How does the study of fossils support evolution ? Explain.

How does the study of fossils support evolution? Explain.

How has the study of fossils helped in convincing the scientists that organisms have come into existence through evolution?

Study the diagram given below and answer the questions that follow : Mention any three adaptations found in plants to overcome the process studied in the experiment. .

What do you understand by infertility ? Mention any three causes of infertility.

Two point charges q and - q are located at points (0 , 0 , - a ) and (0 , 0 , a) respectively : (a) Find the electrostatic potential at (0 , 0 , z) and ( x, y , 0). (b) How much work is done in moving a small test charge from the point (5 , 0 , 0 , ) to (-7 , 0 , 0 ) along the x - axis ? (c) How would your answer change if the path of the test charge between the same points is not along the x axis but along any other random path ? (d) If the above point charges are now placed in the same position in a uniform external electric field vecE , what would be the potential energy of the charge system in its orientation of unstable equilibrium ? Justify your answer in each case .

Given below is an experimental set-up to demonstrate a particular process. Study the same and answer the questions that follow : Mention any three adaptations found in plants to overcome the physiological process mentioned in being studied.

Mention three important features of fossils which help in the study of evolutions

The microscopic grains of the past are obtained as fossils. Mention the characteristic of the pollen grains that makes it happen.