Four of the five outcomes listed below are related to
the accumulation of oxygen in the atmosphere. Select
the exception.
a. Further chemical origin of living cells stopped.
b. Chemical attacks by oxygen radicals stopped.
c. Aerobic respiration evolved.
d. With few exceptions, complex organic
compounds could no longer form.
e. Some cells detoxified oxygen by using it to
accept electrons.
Answer: b
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The probability that an ancient species will be represented in the fossil record is a function of:
A. the properties of the organisms themselves, such as whether or not they make hard skeletons. B. the properties of the environments in which they live, such as whether or not burial was likely. C. the properties of the climate in which they live, such as how warm or cold it was. D. the properties of the organisms themselves and the environments in which they live. E. all of the answer options are correct.
At the molecular level, how do proteins like repressors bind to DNA? How can binding affinities be increased or decreased?
What will be an ideal response?
Similarity due to convergent evolution is called
A. analogy. B. homology. C. taxonomy. D. cladistics. E. phylogeny.
Which of the following procedures is currently the standard test used in the United States for evaluating the efficiency of antiseptics and disinfectants?
A) use-dilution test B) microbial death rate C) in-use test D) Kelsey-Sykes capacity test E) phenol coefficient