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Why do higher trophic levels in most ecosystems contain fewer organisms than lower trophic levels?
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Which property is used to identify the origin of an igneous rock? color density hardness crystal size
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Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.
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Why do higher trophic levels in most ecosystems contain fewer organisms than lower trophic levels?...
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