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 > Ecology

nitrification

Biology; Ecology

Cycling of nitrogen from the air and soil to plants, animals, and then back to the environment. Bacteria, legumes, and algae convert atmospheric nitrogen into nitrates that enter ...

geologic time scale

Biology; Ecology

A scale that measures the vast amounts of time over which geological changes occur. Divided into eons, eras, periods, and epochs. We are now in the Phanerozoic Eon that started ...

dualism

Biology; Ecology

The perceived split between people and nature normally traced back to French philosopher Rene Descartes but with roots in monotheism, Plato, and still older sources. Val Plumwood ...

hypoxia

Biology; Ecology

Depletion of oxygen in water to less than 2 miligrams/liter. An excess of nutrients (eutrophication) from fertilizer runoffs, air pollution, sewage, soil erosion, and other ...

taxonomy

Biology; Ecology

The classification of life, starting with Aristotle's attempts. Botanist Carl Linneaus worked out a system in 1735 whose primary categories are still in use. From largest to ...

food chain

Biology; Ecology

The path of food energy transfer from green plants (primary producers) to grazers (primary consumers), omnivors and carnivores (secondary consumers), and to their predators (top ...

evolution

Biology; Ecology

A daptive changes in the genetic characteristics of a population over time--but this adaptation is not necessarily “improvement.” This entry says "Evolution" and not "Evolutionary ...