DNA supercoils that result from overwinding produce ____ supercoils

Fill in the blank with the appropriate word.


positive

Biology & Microbiology

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Suppose the pair-rule genes were inactivated in Drosophila embryos. What is the likely result of the experiment?

A) The embryos would develop normally. B) The embryos would lack several segments. C) The embryos would have impaired anterior-posterior polarity. D) The embryos would have missing alternate segments.

Biology & Microbiology

Which region of the U.S. has the most acidic rainfall?

a. Northwest b. Southeast c. Northeast d. Central e. Southwest

Biology & Microbiology

In the Gram stain, the mordant is

A. crystal violet. B. safranin. C. iodine. D. water. E. alcohol.

Biology & Microbiology

When biologists use the terms fitness or fittest they are talking about __________.

a. how long an individual lives b. passing genes on to the next generation c. how healthy an individual is d. how strong an individual is

Biology & Microbiology