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a species that is not indigenous.
a kingdom of plant-like unicellular and multicellular organisms that do not contain chlorophyll...
hormone produced by the pancreas, which catalyses the conversion of glycogen to glucose.
emitting (or giving off) radiation energy, which is harmful to living organisms.
single-celled floating algae, which provide food for marine animals, such as fish and whales....
the actions of the body's immune system that work to fight infections or disease.