The loss of genetic variation likely stemmed from an increase in the mutation rate.
a. true
b. false
Ans: b. false
(A higher mutation rate would increase genetic variation).
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The name given to double-stranded DNA that is twisted upon itself is ________.
Fill in the blank(s) with the appropriate word(s).
A ring species is one where
a. a clinal variation occurs. b. all of the various populations can successfully mate in nature. c. an area's climate interferes with speciation. d. none of the various populations can successfully mate in nature. e. only intermediary populations can mate successfully.
In Type-I survivorship, the young have a high probability of surviving. Indicate whether the statement is true or false
Which of the following is a type of cytopathic effect?
A. inclusions in the nucleus B. rounding of cells C. inclusions in the cytoplasm D. multinucleated giant cells E. All of these choices are correct.