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A tropical grassland biome with scattered individual trees, large herbivores, and three distinct seasons based primarily on rainfall, maintained by occasional fires and drought.A chain of supporting cells enclosing the axons of many neurons and forming an insulating layer called the myelin sheath.All the while they have to keep their skin wet to enable oxygen absorption.← BACK The synthesis phase of the cell cycle, constituting the portion of interphase during which DNA is replicated.

A property of biological membranes that allows some substances to cross more easily than others.I knew about fish that spend a good deal of time out of the water, and had heard of mudskippers.I had no idea that males demonstrate their fitness through acrobatic flips and leaps, though.The fluid that is ejaculated by the male during orgasm; contains sperm and secretions from several glands of the male reproductive tract.A three-part chamber of the inner ear that functions in maintaining equilibrium.

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