The surface tension of the alveolus is reduced by surfactants produced by what type of cells?
A) ciliated
B) goblet
C) type I alveolar
D) type II alveolar
E) type III alveolar
Answer: D) type II alveolar
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To further reduce the possibility of biological contamination, MOST treatment plants treat the effluent with
A) fluorine. B) chlorine. C) ozone. D) extreme heat.
Consider a diploid organism (2n) with a haploid complement (n) of four chromosomes. At prophase I, how many total chromosomes will be present in a cell?
A. four, one complete set of chromosomes B. eight, four pairs of homologous chromosomes C. 12, four pairs of homologous chromosomes and their haploid complement D. 16, four pairs of homologous chromosomes and two sister chromatids per chromosome
The reservoir of infection for botulism and tetanus is
A. humans. B. soil. C. water. D. animals. E. soil AND water.
Estimates of spontaneous mutation rates are made using dominant disorders because
A) it takes several generations for the phenotype to change. B) they do not affect offspring. C) the mutant phenotype is obvious. D) they can be identified by DNA sequencing.