When a farmer grows cotton containing the gene for Bt toxin, insects that are resistant (rr) survive and reproduce. This is an example of

A. genetic drift.
B. dominance.
C. natural selection.
D. recombination.
E. independent assortment.


C. natural selection.

Biology & Microbiology

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Shine–Delgarno sequences are present in mRNAs of

A) prokaryotes. B) eukaryotes. C) fungi. D) algae. E) mosses.

Biology & Microbiology

Translation is the process of creating a coded message of a single gene

a. true b. false

Biology & Microbiology

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over

spotted (s). If two black, solid dogs were crossed several times and the total offspring were eighteen black, solid and five black, spotted puppies, the genotypes of the parents would most likely be a. Bb Ss ? Bb Ss. b. Bb Ss ? Bb SS. c. BB Ss ? Bb ss. d. BB Ss ? Bb Ss. e. Bb ss ? Bb SS.

Biology & Microbiology

Your liver produces 90% of the cholesterol found in your body.  When cholesterol levels get too high, the first enzyme in the pathway of cholesterol synthesis is inhibited.  This is an example of

A. Feedback inhibition B. Equilibrium C. Denaturation D. A coenzyme E. Positive feedback

Biology & Microbiology