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three pairs of exocrine glands which secrete saliva into the mouth.
substance used to test for the presence of starch. It is a mixture of elemental iodine,...
a naturally occurring sequence of organisms from the various trophic levels that feed on each...
the blood vessel that carries blood from the digestive tract to the liver.
a species that has a large effect on its environment relative to its abundance and plays an...
a small, corky pore or narrow line on the surface of the stem of a woody plant that allows the...