What is the dominant sulfur gas emitted from freshwater wetlands?
A) dimethylsulfide
B) S2
C) SO4
D) H2S
D
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What is occurring at Time C that is decreasing the DNA content?
A) crossing over B) cytokinesis C) degradation of DNA that was not retained in the recipient's chromosome D) reversal of the direction of conjugation
Arrange the following from most general (i.e., most inclusive) to most specific (i.e., least inclusive):
1. Natural selection 2. Microevolution 3. Intrasexual selection 4. Evolution 5. Sexual selection A) 4, 1, 2, 3, 5 B) 4, 2, 1, 3, 5 C) 4, 2, 1, 5, 3 D) 1, 4, 2, 5, 3 E) 1, 2, 4, 5, 3
Most of the growth of a plant body is the result of
a. cell differentiation. b. morphogenesis. c. cell division. d. cell elongation. e. reproduction.
In your backyard you overturn a large rock. In the damp soil underneath the rock, you see various insects scurrying for cover: one black spider, five black ants, two brown beetles, and three gray pillbugs. In this community of organisms, species richness
is represented by A) the ants, since there are more of them than any other organism. B) eleven total organisms. C) four different species of organisms. D) the ants and the spider equally, since they have the greatest number of organisms of the same color.