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a small, corky pore or narrow line on the surface of the stem of a woody plant that allows the interchange of gases between the interior tissue and the surrounding air.
bacteria that convert nitrogen in the air into compounds such as nitrites, nitrates and ammonia...
is the gradual increase in the average temperature of Earth's atmosphere and oceans.
(also called caustic soda) a white solid, available in pellets, flakes or granules, with the...
an endocrine gland attached to the base of the hypothalamus, which secretes hormones that play a...