Even though nitrogen constitutes 78% of Earth's atmosphere, the amount available for living things nearly all comes from nitrogen-containing fertilizers. a few groups of nitrogen-fixing bacteria. the breakdown of dead plants. the breakdown of minerals. a few genera of detritivores.
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The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important
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What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled
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Even though nitrogen constitutes 78% of Earth's atmosphere, the amount available for living things n...
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