Which of the following is the best definition of oxidative phosphorylation?
A) Electrons are passed through a series of carriers to O2.
B) A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP.
C) ATP is directly transferred from a substrate to ADP.
D) Electrons are passed through a series of carriers to an organic compound.
B
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If a certain water-soluble, intravenous antibiotic is not succeeding in defeating the germs inside the central nervous system, the ________ may be preventing the antibiotic from reaching the brain
Fill in the blank(s) with correct word
Which of the following pairs is mismatched?
A. Helminths; multicellular B. Algae; multicellular C. Fungi; multicellular D. Protozoa; unicellular E. Protozoa; multicellular F. Fungi; unicellular
An evolutionary advancement occurred when organisms became multicellular and acquired a division of labor.
a. true b. false
Many people assume pedigrees are like phylogenies. Which of the following comparisons between pedigrees and phylogenies are true?
a. Both show the splitting and the recombining of branches or lineages over time. b. A pedigree tells us about the ancestry of individuals, while most phylogenies tell us about the ancestry of populations. c. Both expand as one looks backward in time. d. All of the above.