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single-celled organisms with all life functions performed within the cell.
the excessive growth of alga and hydrophytes in response to the addition of artificial or...
breaking down of large nutrient molecules using chemical means (e.g. through the action of...
a form of asexual reproduction. It is an unequal cell division, in which a small cell forms...
small units of DNA that contain hereditary information that is passed from one generation to the...
group of similar organisms that can breed with each other to produce fertile offspring. It is...