Two loci evolving together as if they are a single locus is called
a. gene clustering.
b. concerted evolution.
c. gene duplication.
d. coevolution.
e. unequal crossing-over.
Ans: b
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Fermentation is associated with a variety of useful products, including ________
a. all of the choices b. cured meats and pickled vegetables c. alcoholic beverages such as beer and wine d. dairy products such as cheese, yogurt, and buttermilk
Which of the following is not true of Streptococcus pneumoniae?
A. It produces an alpha-hemolysin and hydrogen peroxide. B. It has a polysaccharide capsule that resists phagocytosis. C. It is a small, gram-negative coccus. D. It is the most frequent cause of community-acquired meningitis.
Alexander Fleming observed a colony of mold that inhibited the growth of nearby bacteria. What was the hypothesis proposed by Fleming to explain this result?
A) The mold produced a substance that killed nearby bacteria. B) The mold was dead. C) The mold used all of the nutrients so that the bacteria couldn't grow. D) The bacteria changed their DNA when growing near the mold.
Only mutations in __________ cells matter in terms of evolution because they can be inherited by the offspring.
Fill in the blank(s) with the appropriate word(s).