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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 > Ecology

stigma

Biology; Ecology

The sticky tip of a pistil. Also: the pigment clusters that serve photosynthetic microbes as a light sensor.

continental drift

Biology; Ecology

The theory that continents are mobile rather than fixed. Proposed by A. Snider in 1858. See Plate Tectonics.

halophyte

Biology; Ecology

A plant that likes saline soil (cordgrass, rushes, pickleweed). Most plants need less salty soil to grow in.

conglomerate

Biology; Ecology

Coarse sedimentary rock composed of weather-rounded rock fragments cemented with silt and clay. See Breccia.

headland

Biology; Ecology

A strip of land that juts seaward, usually with a cliff adjacent. Called a promontory when high and narrow.

radioactive decay

Biology; Ecology

The decay of an unstable nucleus (radionuclide) of an atom losing protons, neutrons, or photons at random.

synapsid

Biology; Ecology

A vertebrate whose skull has one pair of openings behind the eyes (like mammals and their close relatives).