Which of the following is increased amphibian diversity correlated with?
A) sea surface temperature
B) net primary productivity
C) altitude
D) distribution of land area across the globe
C
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In this equation p2 + 2pq + q2 = 1, what does the term 2pq represent?
A. The genotype frequency of homozygous recessive individuals B. The genotype frequency of homozygous dominant individuals C. The genotype frequency of heterozygous individuals D. The sum of the phenotype frequencies in the population
The process by which a nontoxigenic Corynebacterium diphtheriae cell is changed into a toxigenic cell is called:
A) conjugation. B) lysogenic conversion. C) transduction. D) transformation.
A manufacturing company dumps its wastes into a nearby pond. One of the wastes is found to paralyze the contractile vacuoles of certain protists. A biologist looking at individual samples of these organisms taken from the pond would find that they
A) have lost water and shrunk. B) have gained water and burst. C) have died of malnutrition. D) have died because wastes have built up in the cytoplasm.
Bioremediation of uranium can be accomplished by microbes that reduce U6+, which is ________, to U4+, which is ________
a. toxic / nontoxic b. soluble / particulate c. radioactive / nonradioactive d. immobile / mobile