What function does sunlight perform in photosynthesis?
A) Sunlight converts electrons in chlorophyll to a lower energy state.
B) Sunlight converts electrons in water to a lower energy state.
C) Sunlight excites electrons in water to a higher energy level.
D) Sunlight excites electrons in chlorophyll to a higher energy level.
E) Sunlight fixes the CO2 into glucose.
Answer: D
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The frequency of recombination is expressed as the ratio of recombinants to the total number of progeny
A. true B. false
Altruistic behavior is
a. selfish. b. sexually directed behavior. c. self-sacrificing behavior. d. aggressive behavior. e. nonreactive, such as freezing at the sign of danger.
What factor is NOT involved in the movement of
water through a plant? a. transpiration pull b. the cohesion of water molecules c. hydrogen bonds d. the replacement of lost water molecules e. active transport
Two mammals, a sheep and a goat, produce offspring. Only the F1 and F2 generations produce fertile offspring. This
occurs as a result of: a. mutation. b. hybrid sterility. c. microevolution. d. hybrid inviability. e. hybrid breakdown