Q42 of 167 Page 210

A gradual change, over a long period, in a form of life is known as :

Evolution

Evolution is a phenomenon that brings about continuous and orderly changes in nature. It is a change through time in physical or biological world.

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40

The human species has genetic roots in:

 41

Which of the following gas was not present in early earth atmosphere?

 43

Scientists believe that all life originated in:

 44

According to scientists, aves have evolved from: