The power used by most bacterial flagellar motors is produced by
A. synthesis of glucose.
B. proton motive force (PMF).
C. ATP hydrolysis.
D. All of the choices are correct.
Answer: B
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Suppose you discover a mouse that has spiky fur instead of the usual soft fur. You notice that this trait seems to be present only in males. To investigate this pattern, you cross a spiky-fur male with a soft-fur female, and find that all the F1 progeny of both sexes have soft fur. You then interbreed the F1 and observe that all the F2 females have soft fur, but 1/4 of the F2 males have spiky fur. You conclude that the spiky allele is
A) an X-linked recessive. B) Y-linked. C) autosomal recessive with sex-influenced expression. D) an X-linked dominant. E) an autosomal dominant with sex-influenced expression.
There is no change in population size when the instantaneous per capita rate of growth (r) is equal to ________
Fill in the blank(s) with correct word
Which time period of Earth represents when evolution was progressing at the most rapid rate, as evidenced by fossils
such as those of the Burgess Shale? a. Silurian period b. Cambrian period c. Devonian period d. Ordovician period e. Carboniferous period
Which of the following is true?
a. RNA is usually single-stranded b. DNA is usually single- stranded c. DNA contains uracil d. RNA contains thymine