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the blood circuit from the heart to the lungs and back to the heart.
a general term form any plant diseases caused by different bacteria and fungi.
(also called macromolecules) large, more complex molecules formed when monomers join together....
the movement of an organism in response to a one-directional source of light when the stimulus...
a small, circular opening in the exoskeleton of insects that allows air to enter the insect's...