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a group of parasitic protozoa. There are several species of plasmodium that cause malaria in humans.
energy resources such as coal and oil, which are being used up much more quickly than they can...
the loss of water vapour from the aerial parts of a plant through stomata or lenticels.
symbiosis where one organism lives on another (on the outside of another).
the windpipe or tube that carries air. It is kept open by C-shaped rings of cartilage.
living ground tissue with thick-walled cells that gives strength, support and protection to a...