Which of the following is a vitamin-deficiency disease?
A. scurvy
B. Lyme disease
C. rabies
D. kwashiorkor
A. scurvy
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Klinefelter syndrome is a genetic disorder in which males have an extra X chromosome
These individuals have some breast development, small testes, and sparse facial and body hair. This syndrome is likely a result of _______________.
a. nondisjunction b. incomplete crossing over c. problems with DNA replication d. lack of spermatogenesis
During the "gap" phases of the cell cycle, most of the activity is directed toward
a. DNA replication. b. nuclear membrane synthesis. c. resting for the next step. d. sorting the chromosomes. e. processes required for cell division.
What is the body's response to a rise in temperature above 37.0 degrees C?
A. Blood vessels in the skin begin to constrict which increases blood flow to the surface of the skin. Environmental variables will help decrease the temperature of the blood. The nervous system also activates the sweat glands which help decrease temperature. B. Blood vessels in the skin begin to dilate which increases blood flow to the surface of the skin. Environmental variables will help decrease the temperature of the blood. The heart rate decreases in an attempt to slow down blood flow. C. Blood vessels in the skin begin to dilate which increases blood flow to the surface of the skin. Environmental variables will help decrease the temperature of the blood. The nervous system will deactivate the sweat glands to help decrease body temperature. D. Blood vessels in the skin begin to dilate which decreases blood flow to the surface of the skin. Environmental variables will help decrease the temperature of the blood. The heart rate increases in an attempt to slow down blood flow. E. Blood vessels in the skin begin to dilate which increases blood flow to the surface of the skin. Environmental variables will help decrease the temperature of the blood. The nervous system also activates the sweat glands which help decrease temperature.
Eukaryotic cilia and flagella:
A) may also act as receptors for hormones. B) are both involved in sweeping the lungs clean of foreign matter. C) occur in large numbers on the surface of the cell. D) are only found in single-celled organisms. E) both have microtubules forming their underlying structure.