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the reproductive organs of angiosperms.
an enzyme that catalyses (speeds up) the hydrolysis (breaking) of a chemical bond.
a genus of the Protozoa consisting of shapeless unicellular organisms that move by means...
proteins that identify and neutralise foreign and potentially harmful antigens by binding onto...
a thin hairlike outgrowth of an epidermal cell of a plant root that increases the surface area...
a kingdom of very small, single-celled organisms without a nucleus. They reproduce asexually by...