Photosynthesis and chemosynthesis are both processes by which organisms produce food; photosynthesis is powered by sunlight while chemosynthesis runs on chemical energy. ... Ecosystems depend upon the ability of some organisms to convert inorganic compounds into food that other organisms can then exploit (or eat!).
Biological evidence of the age of the earth includes fossil evidence, comparative anatomy and molecular clocks. The correct options among all the options that are given in the question are the second, third and fourth options. I hope that the answer has come to your help.
