Testosterone _____
a. stimulates oogenesis
b. promotes deviant sexual behavior
c. halts the growth of secondary sexual characteristics
d. is responsible for the development of the female genitalia
e. is responsible for the development of the male genitalia
ANSWER: e
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Which of the following is the most likely plant response to an attack by herbivores?
A) leaf abscission to prevent further loss of tissue B) early flowering to reproduce before being eaten C) production of chemical compounds for defense or to attract predators D) production of physical defenses, such as thorns E) production of thicker bark and cuticle to make it more difficult to eat
Examine the figure above. In the continental U.S., the dark green patches show areas with the highest bird species richness. What best explains why these areas have such diversity?
A. These areas have the highest temperatures in the continental U.S.
B. These areas have mountainous terrain.
C. These areas have well-protected natural areas.
D. These areas have low frequencies of extreme weather events and fire.
The deamination of cytosine creates
A) 5-methyl cytosine. B) uracil. C) 2-aminopurine. D) 5-bromouracil. E) thymine.
The biological species concept is favored by systematists because when reproductive isolation evolves, there is a barrier to gene flow that allows for the isolated groups to generate their own unique divergent traits.
a. true b. false