Which of the following assumptions is made by scientists who apply the concept of maximum parsimony?
a. Assume that the most obvious and simple way is correct.
b. Assume that unexpected relationships are caused by mutations.
c. Assume that most trait changes are typically undetectable.
d. Assume that evolutionary modifications are branchpoints.
a. Assume that the most obvious and simple way is correct.
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Which of the following is an advantage to using phenolics as antimicrobial agents?
A. They are effective sterilants against all microbial forms. B. The presence of organic matter does not limit its antimicrobial qualities. C. They have low toxicity. D. They are not susceptible to resistance by organisms.
If the base in a DNA strand is changed from cytosine to adenine, the base pair in mRNA is
A. uracil. B. cytosine. C. thymine. D. guanine.
Peas were a good organism of choice for Mendel because
A) he could study one trait at a time. B) they cannot self-fertilize. C) they cannot cross-fertilize. D) the traits were difficult to visualize.
Which of the following statements is true about the decolorizing step for the acid-fast stain?
A) Because acid-fast bacteria have a waxy cell wall that resists decolorization by the acetone-alcohol rinse, they appear a deep blue at the end of the procedure. B) Over-decolorizing can lead to false-positive results. C) Acetone-alcohol solution is the decolorizing agent. D) The decolorizing step is the differentiating step. E) Non-acid-fast bacteria appear bright pink-red at the end of the procedure.