Statistical analysis of genetic variation within and among human populations—including those we identify as different races—reveal:
A. more genetic variation between groups
than we see within groups.
B. more genetic variation within groups than
we see between groups.
C. no clear pattern of genetic variationâ€"in
some regions, we would see more variation
within than among groups, and in some
regions we would see the opposite.
D. a correlation between the amount of
genetic variation between groups and the
length of time the groups have been isolated
from one another.
E. None of the above.
A
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Diversification of mammals after the extinction of the dinosaurs is considered an adaptive radiation because a few mammal species rapidly evolved into most of the current mammalian lineages in a relatively short amount of time. This diversification was partially driven by the evolution of endothermic homeostasis in mammals, which is an example of
A. allopatric speciation. B. reproductive isolation. C. a key innovation. D. hybridization. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about adaptive radiation? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following occurs in feedback inhibition?
a. Coenzymes block enzyme activity. b. Products of metabolic reactions block enzyme activity. c. NADH is altered in electron transport chains. d. ADP is phosphorylated. e. Low reactant concentrations decrease enzyme activity.
The above photomicrograph is of
a. mycelium. b. protistans. c. mycorrhizae. d. stolons. e. rhizoids.
The correct sequence of the stages of viral replication is:
a. Attachment - Synthesis - Penetration - Assembly - Release b. Penetration - Attachment - Assembly - Synthesis - Release c. Penetration - Attachment - Synthesis - Release - Assembly d. Attachment - Penetration - Assembly - Synthesis - Release e. Attachment - Penetration - Synthesis - Assembly - Release