Which subatomic particles have a negative charge?
a. neutrons only
b. protons only
c. electrons only
d. both neutrons and protons
e. both protons and electrons
ANSWER: c
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The target of a site-specific recombinase consists of:
A. one short, asymmetric core sequence; two inverted-repeat binding sites; and one cleavage site. B. one short, asymmetric core sequence; two direct-repeat binding sites; and one cleavage site. C. two short, asymmetric core sequences; two inverted-repeat binding sites; and one cleavage site. D. one short, palindromic core sequence; two inverted-repeat binding sites; and one cleavage site. E. one short, palindromic core sequence; two direct-repeat binding sites; and one cleavage site.
A life table
A. provides data on the number of individuals alive in a particular age class. B. more often than not excludes males. C. typically includes age classes each representing one year. D. allows predictions to be made on how a population will grow. E. All of the answers are correct.
If bacteria living in salty seawater were displaced to a freshwater environment, the cell structure that would prevent the cells from rupturing is the ________.
A. capsule B. cell membrane C. endospore D. cell wall E. slime layer
The orderly replacement of one community by another is known as:
a. character displacement. b. succession. c. coevolution. d. the edge effect. e. competitive exclusion.