Biology

Biology

A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.

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Biology > Cell biology

secretion

Biology; Cell biology

The release of a substance in response to the presence of food or speciÞc neural or hormonal stimulation.

proximal tubule

Biology; Cell biology

The winding section of the renal tubule where most reabsorption of water, sodium, amino acids, and sugar takes place.

matter cycling

Biology; Cell biology

The þow of matter through various organisms and the physical environment of an ecosystem.

euphotic zone

Biology; Cell biology

The upper part of the marine biome where light penetrates and photosynthesis occurs; usually extends to about 200 meters below the water surface.

intracellular parasites

Biology; Cell biology

Viruses that enter a host cell and take over the host's cellular machinery to produce new viral particles.

prey switching

Biology; Cell biology

The tendency of predators to switch to a more readily available prey when one prey species becomes rare; allows the Þrst prey population to rebound and helps prevent its ...