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Define fossils. Explain briefly any two ways in which the study of fossils helps in understanding about the past life.

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Fossils-the remains of an animal or plant preserved from an earlier era inside a rock or other geologic deposit, often as an impression or in a petrified state.

-The age of fossils can be estimated by the depth of layers or rock
-It can also be estimated by the isomers of the fossil contained rocks
-They help up the study and know about those species which are no longer alive
-They also help in forming of pathway on animals through their way of evolution
-Thus we can find the types of organims be it plants animals and microbes that existed at a particular geological time and reconstruct evolutionary process

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These are the remains of the dead plants and animals over more years ago.
By carbon dating method and the depth of the fossil
It helps about the evolution of the organisms and its heredity
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