To grow on artificial medium, prototrophic bacteria require
A) sunlight.
B) amino acid supplements.
C) vitamin supplements.
D) All of these
E) None of these
E
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Which zone of an estuary will hold the greatest species diversity? a. Mid littoral zone b. They all hold the same amount of species
c. There are no species in the estuary zones. d. Upper littoral zone e. Lower littoral zone
The persistence of the sickle-cell anemia allele in the
African population is the result of a. a high rate of mutation of the normal allele to the sickle-cell anemia allele. b. the advantage of the heterozygous form over the homozygous forms. c. nonrandom mating. d. a decline in the occurrence of malaria in Africa. e. genetic drift.
In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of the allele a is 0.4. What is the percentage of the population that is homozygous for this allele?
A) 4 B) 16 C) 32 D) 36 E) 40
Which of the following supposedly speeds the removal of lactic acid from contracting muscles?
a. Caffeine b. Growth hormone c. Phosphate loading d. Bicarbonate loading