Niche refers to the
a. home range of an animal.
b. preferred habitat for an organism.
c. functional role of a species in a community.
d. territory occupied by a species.
e. locale in which a species lives
C
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Which of the following mechanisms is (are) used to coordinate the expression of multiple, related genes in eukaryotic cells?
A) Environmental signals enter the cell and bind directly to promoters. B) The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time. C) The genes are organized into a large operon, allowing them to be coordinately controlled as a single unit. D) A single repressor is able to turn off several related genes.
Which of the following exert bottom-up control?
A. parasites. B. predators. C. roots. D. parasites, predators, and roots. E. None of the answers is correct.
Which of the following strategies has the potential to employ the most biodiversity?
A. terracing B. contour farming C. intercropping D. no-till farming E. low-input agriculture
One of the ways that cells balance anabolism and catabolism is to
A) use feedback inhibition to shut down a pathway that is not needed. B) use the same enzyme to run a reaction in both the catabolic and anabolic direction. C) use the same enzyme to run a reaction in both the catabolic and anabolic direction and use feedback inhibition to shut down a pathway that is not needed. D) use separate coenzymes such as NAD+ vs. NADP+ for catabolic vs. anabolic pathways. E) use feedback inhibition to shut down a pathway that is not needed and use separate coenzymes such as NAD+ vs. NADP+ for catabolic vs. anabolic pathways.