Most of the enzymes are proteins.
a. true
b. false
Ans: a. true
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Green and purple bacteria are ________. This group of organisms removes electrons from sulfide, thiosulfate, and succinate to generate NADPH.
Fill in the blank(s) with the appropriate word(s).
If a child belongs to blood type O, he or she
could NOT have been produced by which set of parents?
a. type A mother and type B father b. type A mother and type O father c. type AB mother and type O father d. type O mother and type O father e. type AB mother and type B father
Which of the following groups is suspected of causing climate change?
A. fossil fuel and hydropower usage B. erosion, deforestation, pollution, and desertification C. overfishing and hydropower usage D. ocean acidification and desertification E. fossil fuel usage, deforestation, and agriculture
A recent study of ecological footprints (described in the text) concluded that
A) Earth?s carrying capacity for humans is about 10 billion. B) Earth?s carrying capacity would increase if per capita meat consumption increased. C) current demand by industrialized countries for resources is much smaller than the ecological footprint of those countries. D) the ecological footprint of the United States is large because per capita resource use is high. E) it is not possible for technological improvements to increase Earth?s carrying capacity for humans.