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that part of the Earth where all living organisms occur.
the excessive growth of algae in eutrophic streams, rivers and dams.
an organelle that occurs in the cytoplasm of both plant and animal cells. It is made from stacks...
the gamete-producing phase that produces the zygote from which the sporophyte emerges.
a prolonged period of low rainfall which has a negative effect on plant, animal and human life...