Cells save energy and materials by using many of the same enzymes for both ________ and ________.
What will be an ideal response?
anabolism, catabolism
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A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these explanations best explains what happened?
A) The herbicide company lost its triazine formula and started selling poor-quality triazine. B) Natural selection caused the pigweed to mutate, creating a new triazine-resistant species. C) Triazine-resistant pigweed has less-efficient photosynthesis metabolism. D) Triazine-resistant weeds were more likely to survive and reproduce.
You discover a new sunflower that has blue flowers instead of yellow. When you cross this blue variety with a common yellow variety you get blue and yellow speckled flowers. What type of inheritance pattern does this gene exhibit?
A. incomplete dominance B. codominance C. simple Mendelian inheritance D. either incomplete dominance or codominance E. sex-influenced dominance
If no oxygen is available to a cell, then the net ATP production resulting from the metabolism of a single glucose molecule is
A) no ATP. B) 36 ATP molecules. C) 1 ATP molecule. D) 32 ATP molecules. E) 2 ATP molecules.
If there is variation in a given character within a population, selection may be unable to act on that character if:
a. the genes involved have effects on other characters that are also under selection. b. there is gene flow into that population. c. the population is peripheral to a larger population that faces different selective conditions. d. All of the above. e. None of the above.