Which of the following statements is an accurate combination of postulates 1 and 2 of natural selection?
A. Environmental variation exists for traits among individuals in a population.
B. Heritable variation does not exist among individuals in a population.
C. Heritable variation exists for traits among individuals in a population.
D. Drug resistance exists among all individuals in a population.
Ans: C. Heritable variation exists for traits among individuals in a population.
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The type of DNA repair that corrects errors due to oxidative damage by replacing one to five nucleotides is
A) mismatch repair. B) base excision repair. C) roto-rooter repair. D) photoreactivation.
What do free radicals do?
a. Improve the efficiency of aerobic respiration. b. Act as coenzymes in glycolysis. c. Damage biological molecules. d. Remove metals that combine with oxygen gas. e. Enhance enzyme activity.
Which of the following actions would increase your carbon footprint?
A) reusing or recycling items B) eating more vegetables and less meat C) eating more beef and less chicken D) walking instead of driving
If the first living thing was produced on Earth,
A. it was produced in the atmosphere. B. it was an aerobic heterotroph. C. spontaneous generation occurred. D. None of these answers is correct.