An organic compound gains an electron from another molecule. The organic compound
A. has been oxidized.
B. is an electron donor.
C. has been reduced.
D. has become more positively charged.
E. has lost a hydrogen atom.
Answer: C
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What will be an ideal response?
According to the pressure-flow hypothesis:a
water moves from an area of positive water potential to an area of negative water potential. b. the evaporative pull of transpiration produces tension at the top of the plant. c. the flow of sugar is driven by a hydrostatic pressure gradient produced by water entering the phloem. d. pressure is created by the movement of water into the roots from the soil. e. the column of water pulled up through the plant is unbroken due to cohesive and adhesive properties.
What happens to the chest cavity and air pressure in the lungs during exhalation?
a. The chest cavity increases, and air pressure decreases. b. The chest cavity increases, and air pressure also increases. c. The chest cavity decreases, and air pressure increases. d. The chest cavity decreases, and air pressure also decreases.
Which type of problems result from mutations in mitochondrial DNA (mtDNA)?
A. Reduced cellular energy B. Balanced translocations C. Excessive "crossing over" D. Single nucleotide polymorphisms