Many bacterial infections of the lower digestive tract are treated with
A) antitoxin.
B) penicillin.
C) water and electrolytes.
D) quinacrine.
E) thorough cooking.
C
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Although inbreeding by itself does not affect allele frequencies, how might inbreeding indirectly affect allele frequencies over the course of many generations if natural selection was also occurring?
A. Inbreeding favors homozygotes. If a homozygote has a higher Darwinian fitness, inbreeding would accelerate the prevalence of the allele in the population. If a homozygote has a lower fitness, inbreeding would accelerate the elimination of the allele from the population. B. Inbreeding favors homozygotes. If a homozygote has a lower Darwinian fitness, inbreeding would accelerate the prevalence of the allele in the population. If a homozygote has a higher fitness, inbreeding would accelerate the elimination of the allele from the population. C. Inbreeding never occurs in a natural population, therefore the fitness and allele frequencies would not be affected. D. None of these choices are correct.
Growth of long bones
a. follows the cartilage model. b. occurs in the middle at first, then at both ends. c. is characterized by bone tissue replacing calcified cartilage. d. is characterized by the persistence of cartilage at both ends of the bone. e. includes all of these.
Living things combine elements in unique ways, creating molecules that nonliving things cannot create
a. true b. false
Which plant cells are the most common and the least specialized?
A. Epidermis B. Meristem C. Collenchyma D. Parenchyma E. Sclerenchyma