| Term | Definition |
|---|
| abiotic | of or characterized by the absence of life or living organisms. |
| absorption (H) | a taking in or reception by molecular or chemical action, as of gases or liquids, the act of absorbing |
| aquatic | living or growing in water, of, in, or pertaining to water, |
| bacteria | various species of which are involved in fermentation, putrefaction, infectious diseases, or nitrogen fixation, one cell organisms |
| biomass | The total mass of living matter within a given unit of environmental area. |
| biomass pyramid | Biomass pyramids show the abundance or biomass of organisms at each trophic level, while productivity pyramids show the production or turnover in biomass. Ecological pyramids begin with producers on the bottom and proceed through the various trophic levels, the highest of which is on top. |
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