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a green pigment in plants, which is needed for photosynthesis.
a hormone that causes the secretion of gastric juices into the stomach.
a substance, usually a liquid, in which other substances can dissolve.
the part of the cell that controls all the activities of the cell and plays an important role in...
neurons that have two outgrowths coming directly from the cell body.
sharp-edged modified last upper premolar and the first molar in carnivores adapted to shear or...