The following figure demonstrates which process by which linkage disequilibrium can be created?
a. drift
b. selection
c. mutation
d. migration
e. All of the above
D
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Antibiotics that affect various strains of Gram-positive bacteria and various strains of Gram-negative bacteria are called
A. isolate usable. B. stress-induced. C. narrow-spectrum. D. broad-spectrum.
NADPH is produced by
A. light reactions alone. B. neither the light reactions nor the Calvin cycle. C. the Calvin cycle alone. D. both light reactions and the Calvin cycle. E. NADPH production is not a part of photosynthesis.
Parabronchi are characteristic of:
a. insects. b. spiders. c. mollusks. d. birds. e. mammals.
An unlabeled signaling diagram for steroid hormones: Fig. 11.8 p. 213, Campbell 8e. A steroid hormone, like estrogen, passes through the plasma membrane and binds to an intracellular protein as shown in the diagram below
This activates a signal-transduction pathway which results in an increased production of a specific protein. Which of the following statements would explain what would occur as a result of the signal pathway represented by the diagram? A) Transfer RNA (t-RNA) would accumulate in high levels because it is not required for protein synthesis. B) Ribosomal RNA (r-RNA) levels would increase because ribosomes are specific for the messenger RNA (m-RNA) with which they bind during transcription of the polypeptide. C) DNA levels would increase in the nucleus as a result of the binding of the hormone-receptor complex with the DNA. D) Messenger RNA (m-RNA) levels would increase in order to be translated into the protein required by the cell.