Which of the following can be duplicated in a genome?
A) only DNA sequences
B) only entire sets of chromosomes
C) only entire chromosomes
D) DNA sequences, chromosomes, or sets of chromosomes
D
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Which pair diverged longer ago from their common ancestor and why?
When comparing the sequences of a homologous gene in four different species, one pair of species shows a 1% difference, whereas the other pair shows a 3% difference. A. The pair with a 1% difference; because a lower difference (1% instead of 3%) has occurred because the common ancestor is younger and more mutations occurred over a shorter amount of time. B. The pair with a 1% difference would have an older common ancestor; A higher difference (1% instead of 3%) has occurred because the common ancestor is older and there has been more time to accumulate mutations. C. The pair with a 3% difference would have an older common ancestor; A lower difference (3% instead of 1%) has occurred because the common ancestor is younger and there has been more time to accumulate mutations. D. The pair with a 3% difference would have an older common ancestor; A higher difference (3% instead of 1%) has occurred because the common ancestor is older and there has been more time to accumulate mutations. E. None of these are correct.
A cancer that develops in muscle is
a. malignant melanoma. b. oat cell carcinoma. c. giant cell carcinoma. d. rhabdomyosarcoma. e. Wilm's tumor.
If your grandparents were in the F1 generation, what generation are you in?
A) F3 B) H3 C) P D) P3
Figure 10.1 shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different?
A) Green and yellow wavelengths inhibit the absorption of red and blue wavelengths. B) Bright sunlight destroys photosynthetic pigments. C) Oxygen given off during photosynthesis interferes with the absorption of light. D) Other pigments absorb light in addition to chlorophyll a. E) Aerobic bacteria take up oxygen, which changes the measurement of the rate of photosynthesis.