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to be unable to breathe, or to have a lack of oxygen.
(also called the pith) the central part of the stem that consists of large, thin-walled...
the formation of the energy transporting molecule (ATP) to be used in the light independent...
an artificial device that helps to stimulate and regulate the heart muscle.
mass extinction event of 65 million years ago, in which about 85% of all species on Earth died...