PSII and PSI differ in __________
A. H+ production
B. H+ production and electron donors
C. H+ production, electron donors, and
acceptors
D. electron donors and acceptors
E. plants and algae
C
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Which of the following is not a step in nonhomologous end joining?
A. phosphorylation of the Ku70-Ku80 complex B. degradation of any single-strand overhangs or hairpins from the broken ends of the chromosomes to be repaired C. binding of the Ku70-Ku80 complex to the broken chromosome ends D. binding of a kinase and a nuclease to the Ku70-Ku80 complex on the DNA E. All of the steps given occur in NHEJ.
The great apes and first hominids arose from a common ancestor approximately ____ years ago
a. 100,000 b. 1 million c. 3 million d. 5 million e. 7 million
Mutations are regarded as a strong evolutionary mechanism for changing allelic frequencies
Indicate whether the statement is true or false
Homeostasis is the ability of the organisms to maintain a stable internal environment.
a. true b. false