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Clean, abundant, unpolluted air and water resources are vital to the survival of life on our planet. Living things cannot survive for long without clean water and air and the efforts in the United States to protect these resources from harmful pollutants and over-exploitation have been extensive and are evolving. […]

The binding of an allosteric inhibitor to an enzyme causes the rate of product formation by the enzyme to decrease. Which of the following best explains why this decrease occurs? a. The allosteric inhibitor binds to the active site, preventing the substrate from binding. b. The allosteric inhibitor binds to […]

Q. Hershey and Chase experimented with radioactively-labeled phosphorus and sulfur to find out that DNA, not protein, is genetic material. Which of the follow was necessary to this confirming experiment? A) Sulfur is present in amino acids in the protein coat of phage. B) Phosphorus is present in high amounts […]

1. Which of the following can be considered a contribution toa density-dependent regulation of populations?A.predation           B. intraspecific competition of nutrients   C. the accumulation of toxic wastesD. none of the above      E. A,B, and C are correct2. The carrying capacity (K) of an environmentA. is always eventually reached in any populationB. […]