Frequency-dependent selection acts to decrease the frequency of which phenotype in a population?
a. The least common phenotype
b. The most common phenotype
c. The most conspicuous phenotype
d. The most camouflaged phenotype
e. The phenotype at an extreme of the normal distribution
b
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Refer to the figure. Which level of structure is maintained by the disulfide bond?
A) primary B) secondary C) tertiary D) quaternary
Which of the following statements about the differences between prokaryotic and eukaryotic genomes is FALSE?
A. Prokaryotic genomes are less complex than eukaryotic genomes. B. Prokaryotic genomes have centromeres, whereas eukaryotic genomes do not. C. Eukaryotic genomes have telomeres, whereas prokaryotic genomes do not. D. Prokaryotic genomes have one origin of replication, whereas eukaryotic genomes have multiple origins of replication. E. Chromosomes of prokaryotes have little repetitive DNA compared with chromosomes of eukaryotes.
The Latin phrase omnis cellula e cellula refers to a cellular principle. Which of the following statements is the best interpretation of this phrase?
A) Tissues are composed of similar cells. B) Cells generally are found in clusters. C) All cells arise only from preexisting cells. D) Organs are composed of tissues and cells. E) The cell is the basic unit of structure.
Fats composed of fatty acids that have double bonds in the fatty acids and have fewer than the maximum number of hydrogen atoms are:
A. saturated B. made of glycerol plus two fatty acids C. liquids at room temperature D. solid at room temperature E. generally found in animal fats