Transition mutations can result from ________.
A. a small insertion or deletion
B. incorporation of a base analog that exhibits different base-pairing properties from the base it replaces
C. incorporation of a base analog that exhibits different base-pairing properties from the base it replaces and chemical modification of an existing base in the DNA so that in the next round of replication it will pair differently from the unmodified base
D. chemical modification of an existing base in the DNA so that in the next round of replication it will pair differently from the unmodified base
Answer: C
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Asplenic individuals have low levels of IgM, and because of this have an increased risk of infection with encapsulated bacteria. How does IgM help control encapsulated bacteria?
A) IgM antibodies bind to bacterial capsules, and clump bacterial cells together, facilitating phagocytosis B) IgM antibodies upregulate body temperature C) IgM antibodies decrease blood pressure D) IgM antibodies cause tachypnea
Which measure of lung volume would be most impacted by emphysema?
1.tidal volume
2.inspiratory reserve volume
3.expiratory reserve volume
4.residual volume
Equilibrial species are shaped by ____, and tend to have a ____
a. K-selection; small body and short generation time b. r-selection; large body and long generation time c. K-selection; large body and long generation time d. r-selection; small body and long generation time
e. r-selection; large body and short generation timeNatural selection
A. is evolution. B. is a key mechanism that causes evolution to happen. C. occurs at the population level. D. results in reproductive success. E. occurs at the population level and is a key mechanism that causes evolution to happen.