1.the variability among living organism from all sources, including terrestrial, marine and other aquatic ecosystem and the ecological complexes of witch they are part. 2.Anything that limits the size of a population like certain environmental conditions.

1.the variability among living organism from all sources, including terrestrial, marine and other aquatic ecosystem and the ecological complexes of witch they are part.
2.Anything that limits the size of a population like certain environmental conditions.
3It occurs in the thylakoids membrane and converts light energy to chemical energy
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