Bioenergetics
The study of how organisms manage their energy resources.
Biogeochemical cycles
The various nutrient circuits, which involve both biotic and abiotic components of
ecosystems.
Biogeography
The study of the past and present distribution of species.
Biological clock
Proposed internal factor(s) in organisms that governs functions that occur rhythmically in
the absence of external stimuli.
Biological magnification
A trophic process in which retained substances become more concentrated with each link in
the food chain.
Biological species
A population or group of populations whose members have the potential to interbreed.
Biomass
The dry weight of organic matter comprising a group of organisms in a particular habitat.
Biome
One of the world's major communities, classified according to the predominant vegetation
and characterized by adaptations of organisms to that particular environment.
Biosphere
The entire portion of Earth that is inhabited by life; the sum of all the planet's communities
and ecosystems.
Biosynthesis
Formation by living organisms of organic compounds from elements or simple compounds.
Biotechnology
The industrial use of living organisms or their components to improve human health and
food production.
Biotic
Pertaining to the living organisms in the environment.
Bipedal
Walking upright on two feet.
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