Phenotypic variation can occur in traits controlled by the same allele
a. True
b. False
True
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Which of the following is a disadvantage of using corn to manufacture ethanol as a fuel additive?
A. Ethanol contains far less energy than other fuels. B. Ethanol absorbs water and would thus corrode fuel pipelines used in transport. C. Use of corn as a fuel source drives up the cost of grain worldwide. D. All of these are disadvantages.
Which of the following do anaerobic
methanogens produce?
a. carbon monoxide b. carbon dioxide c. ammonia sulfide d. methane e. hydrogen sulfide
Which of the following happens during contraction of a skeletal muscle?
1.The myosin strands get shorter.
2.The concentration of Ca2+ in the cytosol of the muscle fiber decreases.
3.Troponin attaches to myosin.
4.The z lines get closer to each other, shortening the sarcomere.
The transfer of pollen from the male reproductive structure to the female reproductive structure is called
A. ovulation. B. implantation. C. pollination. D. photosynthesis.