oxygen and glucose
Billions, but what needs attention are the trillions of unneeded molecules that are 'automatically' excluded from the cells of living organisms.
Cells.
Organic molecules are the part of life we are living in earth... it is common for all level of organisms on earth.
Organic molecules form the structure of all living organisms and derive energy from the organism's environment.
Yes but only when they form organic molecules that form living organisms or when the molecules are important to certain organisms.
Carbon and hydrogen
Lipids
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Organic
Prebiotic chemical evolution gave rise to progressively more complex molecules and eventually to living organisms
Salt and sugar
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