Question

what are fossils? how are they formed list two methods of determining the age of fossils. explain in brief the importance of fossils in deciding the evolutionary relationship

Answer 1

when the dead - decaying plants and animals are burried inside the earth than after millions of year they form into fossils
to determine their age-
• by checking how much earlier they are found inside. the earlier they are the smaller the age
• by taking the ratio of to their similar isotopes found
they are really imp. in evolutionary relationship because they are the connecting link between the ancestors and the modern creature.

Answer 2

Fossils

• The remains of dead or decayed plants and animals are called fossils.

Formation of fossils

• Fossils are formed when dead organisms are compressed under high pressure deep under the soil.

Methods of determining the age of fossils

• Relative method

• Carbon dating method

Importance of fossils

• Fossils help in determination of the connecting links between various groups and their origin from the primitive ones.

• The presence of fossilized remains of the organisms is the evidence of existence of the organisms millions of years ago, out of which some have become extinct.