A drug that inhibits the activity of bacterial DNA gyrase ______ be a good antibiotic because _______
A. would; it would inhibit all DNA synthesis
B. would NOT; it would inhibit all DNA synthesis, even our own cell's DNA synthesis
C. would; it would selectively inhibit bacterial DNA synthesis due to differences between bacterial/human gyrase
D. would NOT; the DNA replication machinery could still function, even with impaired DNA gyrase enzyme
C
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Which of the choices best describes macroevolution?
A) Individuals with one genotype reproduce more than individuals with another genotype in a population. B) Mutation creates new alleles that are dominant. C) A new species emerges. D) Dominant and recessive allele frequencies are in equilibrium in a population.
One reason that atrazine, an herbicide in use for more than 40 years, is an environmental problem is that it ____
a. raises the level of air pollution b. poses a substantial contribution to greenhouse gases c. disrupts the stratospheric ozone level d. is responsible for the extinction of bee colonies e. is an endocrine disrupter and can reduce reproductive capacity in aquatic animals
All populations of all species in a habitat are a __________. Fill in the blank(s) with the appropriate word(s)
As temperatures continue to rise, the photosynthetic rate reaches a maximum related to
A) the temperature response of rubisco. B) the thickness of the boundary layer. C) soil temperature. D) oxygen availability.