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A population of otters (tertiary consumers) lives in an ecosystem in which mercury is at a concentration of 0.004 g/kg in primary producers. What is the approximate concentration of mercury in otters? Assume that 90% of the energy at each trophic level is lost as heat, and that no mercury is excreted or breaks down through the food web.
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Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.
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Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.
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A population of otters (tertiary consumers) lives in an ecosystem in which mercury is at a concentra...
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