Cattle breeders have improved the quality of meat over the years by which process?
A) artificial selection
B) directional selection
C) stabilizing selection
D) A and B
E) A and C
Ans: D) A and B
You might also like to view...
Retroviruses are characterized by
a. an RNA core. b. integrating DNA into the host’s chromosome. c. the enzyme reverse transcriptase. d. having one strain that causes AIDS. e. all of these.
Which region of the ? phage genome enables the linear chromosome to circularize when it enters a host cell?
A) cohesive (cos) site B) IS10 C) early operators D) integrase (int) gene E) excisionase (xis) gene
What feature of fats makes them hydrophobic?
A) Fats have carboxyl groups. B) Fats include one glycerol molecule. C) Fats have polar fatty acids. D) Fats have nonpolar hydrocarbon chains.
You are hiking with a friend and reach the peak of a mountain after a long climb. On your climb upward, you had a clear trail with a little grass and small shrubs along the way. But looking down the other side, you see lush vegetation and many broadleaf
trees farther down the slope. Your friend wonders why there is such a big difference. What explanation can you offer your friend? What will be an ideal response?