Photosynthetic organisms of the open oceans are confined to the upper
A. two hundred meters.
B. two hundred kilometers.
C. two thousand kilometers.
D. two hundred centimeters.
E. two hundred millimeters.
Answer: A
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The retroviruses, including HIV, are unique because they use
A) replication. B) reverse transcription. C) splicing. D) reverse translation. E) posttranslational modification.
Nearsightedness is dominant to normal vision and hazel eyes are dominant to blue eyes. A nearsighted woman with hazel eyes who is heterozygous for both traits marries a man with normal vision and hazel eyes. His genotype for eye color is the same as his wife's. Their three children all have blue eyes and normal vision. What is the probability that their next child will have blue eyes and be nearsighted?
A. 1/2 B. 3/8 C. 1/4 D. 5/8 E. 1/8
Sexual dimorphism, as seen in the crayfish, is
(a) the presence of male and female individuals. (b) the production of eggs and sperm by the same individual. (c) another term for copulation. (d) the presence of observable differences between males and females.
High-fat, high-protein diets make the ________ work harder, increasing the risk of problems with this organ
a. pancreas b. liver c. kidneys d. intestines