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an abnormal response of the immune system to the protein in certain foods.
a prolonged period of low rainfall which has a negative effect on plant, animal and human life...
(also called primary meristems) meristems at the apex (tip) of stems and roots where primary...
a strong ring of smooth muscle at the end of the pyloric canal which lets food pass from the...
organisms that feed on dead organic matter and thereby release nutrients back into the soil.