A former basketball player complains of significant right knee pain. After examination, it is determined that he needs
a knee replacement. The most likely cause of his issue is ____.
a. osteoarthritis
b. vitamin D deficiency
c. growth hormone deficiency
d. rheumatoid arthritis
e. osteoporosis
ANSWER: a
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What are the results of an increase in global
temperature?
a. extreme amounts of rainfall b. droughts followed by heavy rains c. increased intensity of hurricanes d. increase in sea level e. all of these
Which one of the following is characteristic of cardiac and smooth muscle, but not skeletal muscle?
A) voluntary contraction B) striated appearance C) presence of gap junctions D) presence of actin and myosin in muscle cells E) contraction is initiated by motor neurons
The absence of ________ leaves obligate anaerobes susceptible to killing by oxygen.
A. carotenoids B. superoxide dismutase C. peroxidase D. vitamin E E. catalase
Imagine that you conduct a phylogenetic analysis of sticklebacks and their relatives
You find that even though stickleback males are the only ones that show red coloration as a derived trait, female preference for red color is indeed found throughout the stickleback relatives. In sticklebacks, red color intensity in males is positively correlated with health, which led researchers to invoke the good genes model for the evolution of red coloration. Do your results change this conclusion in favor of sensory bias as an explanation? a. No, we can exclude sensory bias, as red coloration is still an honest indica-tor of male health. b. Yes, according to the new results the sensory bias model is the most parsi-monious explanation and good genes can be excluded. c. Not necessarily, one model does not exclude the other. d. If females have healthier offspring when they mate with red males, sensory bias can be excluded. e. A and D.