Which city would have the largest variation in daylight hours between the summer solstice and the winter solstice?
A) New York, New York
B) Los Angeles, California
C) Miami, Florida
D) Montreal, Canada
D
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When a population goes through a bottleneck,
a. genetic drift is likely to occur. b. mutation rates increase. c. extinction rates decrease. d. natural selection decreases in intensity. e. inbreeding decreases
A hypothetical population has two alleles for a gene: A and a. In a random sample of 50 individuals, 20 are homozygous for a, 20 are homozygous for A, and 10 are heterozygous. What is the frequency of A?
A) 20% B) 40% C) 50% D) 60% E) 80%
A woody plant lives through 5 years of drought, followed by 5 years of good growing conditions. The ring of xylem cells formed during the 5 good years will
A) be thicker than those formed during the drought years. B) be living, whereas those formed during the drought years will be dead. C) be thinner than those formed during the drought years. D) conduct a higher ratio of sugar to water than those formed during the drought years.
When you digest the starch in plants into glucose, some energy is lost as heat. This increases the ________ of the universe
A) equilibrium B) order C) potential D) entropy E) energy