Cell biology

Cell biology

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

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Cell biology

adhesion

Biology; Cell biology

The ability of molecules of one substance to adhere to a different substance.

adrenocorticotropic hormone (ACTH)

Biology; Cell biology

A hormone produced by the anterior pituitary that stimulates the adrenal cortex to release several hormones including cortisol.

adventitious roots

Biology; Cell biology

Roots that develop from the stem following the death of the primary root. Branches from the adventitious roots form a fibrous root system in which all roots are about the same size; occur in ...

adaptive radiation

Biology; Cell biology

The development of a variety of species from a single ancestral form; occurs when a new habitat becomes available to a population. Evolutionary pattern of divergence of a great many taxa from a ...

adenosine diphosphate (ADP)

Biology; Cell biology

Lower energy form of ATP, having two (instead of the three in ATP) phosphhate groups attached to the adenine base and ribose sugar.

One of the four nitrogen-containing bases occurring in nucleotides, the building blocks of the organic macromolecule group known as nucleic acids (DNA and RNA). Adenine is also the base in the energy ...