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minute pores in the epidermis of a leaf or stem which allows for movement of gases and water vapour.
a prolonged period of low rainfall which has a negative effect on plant, animal and human life...
disease caused when the arteries that supply the heart muscle become narrowed or blocked by the...
the teeth found at the back of the mammalian jaw. In herbivores they have broad surfaces and...
the thin moist surface across which gaseous exchange occurs.
parenchyma cells that are exposed to light and contain many chloroplasts. Chlorenchyma cells...