Cell biology

Cell biology

The study of cell structure, physiological properties, interactions with the environment and life cycle.

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Cell biology

Vitamins

Biology; Cell biology

A diverse group of organic molecules that are required for metabolic reactions and generally cannot be synthesised in the body.

White blood cell

Biology; Cell biology

Component of the blood that functions in the immune system. Also known as a leukocyte.

Wood

Biology; Cell biology

The inner layer of the stems of woody plants; composed of xylem.

Viroids

Biology; Cell biology

Infective forms of nucleic acid without a protective coat of protein; unencapsulated single-stranded RNA molecules. Naked RNA, possibly of degenerated virus, that infects plants.

Virus

Biology; Cell biology

Infectious chemical agent composed of a nucleic acid (DNA or RNA) inside a protein coat.

Vestigial structures

Biology; Cell biology

Nonfunctional remains of organs that were functional in ancestral species and may still be functional in related species; e.g., the dewclaws of dogs.

Finger-like projections of the lining of the small intestine that increase the surface area available for absorption. Also, projections of the chorion that extend into cavities Þlled with maternal ...