Which of the following statements concerning Rocky Mountain spotted fever is correct?
A. The causative bacterium is transmitted by Ixodes ticks.
B. Infections are seen in highest numbers in the Rocky Mountains.
C. An infection rarely has complications beyond mild discomfort.
D. Disease symptoms include fever, headache, and rash.
Answer: D
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Who proposed that there had been a single supercontinent on Earth which led to the idea of continental drift?
a. Edward Suess b. Sir Francis Bacon c. Alfred Wegener d. The Laurasia
The total number of individuals in a population is the:
a. population distribution b. population growth c. population birth rate d. population size e. carrying capacity
Which of the following is the CORRECT sequence of stages in cellular respiration?
A) glycolysis, citric acid cycle, electron transport B) citric acid cycle, glycolysis, electron transport C) citric acid cycle, electron transport, glycolysis D) electron transport, glycolysis, citric acid cycle
What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?
A. After one round of sperm production he would no longer be able to produce sperm and would be infertile. B. He would be entirely normal, since this is what usually happens. C. He would produce twice as many sperm and would be protected against infertility from other causes. D. He would produce twice as many sperm, which would crowd them during later development and lead to morphological defects.