Mammals underwent an evolutionary "explosion" or major adaptive radiation in the
a. Mesozoic.
b. Cambrian.
c. Triassic.
d. Devonian.
e. Cenozoic.
E
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An individual's ability to excel in certain types of sports may be due to different muscle fiber types
Certain muscle types allow some people, like marathoners, to have the ability to be involved in sports which require sustained activity of their muscles, while other muscle types, like in sprinters, allow people to excel in sports which require a rapid burst of muscle activity but fatigue quickly. The sustained activity of muscles in marathon runners is due to the higher yield of ATP per glucose. What differences would you predict for marathoners' muscles compared to sprinters'? What will be an ideal response?
In the cyclic pathway, electrons ejected from photosystem I return to:
a. photosystem II b. photosystem I c. the stroma d. the outer chloroplast membranes e. ATP synthase
Characterize the demographic transition seen in the human population. When did it occur?
What will be an ideal response?
Molecular biologists can determine experimentally whether a region of DNA contains closed chromatin or open chromatin by assessing the sensitivity of the region to __________
A) nucleosomes B) histone deacetylase C) RNA polymerase II D) methyltransferase E) DNAse