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a system of support in soft-bodied animals, which relies on pressure of fluids in the body cavity.
a large combination of RNA and protein which catalyses the formation or synthesis of proteins ...
the internal supporting framework made of cartilage and/or bone. This type of skeleton occurs in...
single-celled algae that have two flagella and are found mainly in seawater but are also common...
the process whereby substances dissolved in the blood (such as H+ ions, nitrogenous waste and...