The development of the reproductive tract and gametogenesis are primarily regulated by _____
A) gonadal steroids
B) pheromones
C) environmental factors
D) diet
Answer: A
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Which of the following proteins attaches a crawling cell to the substrate in a focal adhesion?
A) actin B) myosins C) ?-actinin D) integrin E) titin
Refer to the accompanying figure. How would the survivorship curve for elephants be represented?
a. The curve A
b. The curve B
c. The curve C
d. Either A or C, depending on the species
e. Elephant populations would be better represented by a curve falling between A and B.
In North America, how does beta diversity of plants (from east to west) change as one moves from south to north?
A) It increases. B) It remains constant. C) It decreases. D) It exhibits no consistent pattern.
What germicidal category has demonstrated better effectiveness as liquid disinfectants?
A. Hydrogen peroxide B. Aldehydes C. Hypochlorites D. Ethylene oxide