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a relationship between two different organisms, of different species, from which at least one of the organisms benefits.
consists of the pectoral and pelvic girdles together with the arms and legs.
the active maintenance of the correct balance of water and solutes in the blood and tissue fluid...
(also called autotrophic organisms) organisms that produce their own organic food, mainly...
dormant, tough and non-reproductive structure that remains dormant until conditions become...
single-celled brown algae found in fresh water and seawater. They have hard, shell-like cell...