Does the presence of the double bond in the hydrocarbon tail of oleic acid change the shape of the molecule?
a. No, because the double bond strengthens the existing shape.
b. No, because there is no double bond in oleic acid.
c. Yes, because the double bond results in a bend in the molecule, forming a rightangle
d. Yes, because the double bond results in a circular structure to the molecule.
c
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As a consequence of the immune system in humans recognizing dsRNA as foreign,
A) dsRNA viruses rarely infect humans. B) dsRNA viruses quickly transcribe their genes into mRNA which is insensitive to immune responses. C) genomes of RNA viruses are often chemically modified to avoid recognition by human immune cells. D) the genomes of dsRNA viruses must avoid human immune cells during infection, including replicating their genomes within their own nucleocapsids.
In the 1960s, evolutionary biologists identified protein polymorphisms using ____, which allowed them to infer how
much genetic variation exists within populations.
a. genome sequencing b. gel electrophoresis c. artificial selection d. polymerase chain reactions e. DNA microarrays
Sexual selection:a
is the basis for establishing elaborate societies. b. leads to a reproductive advantage for some individuals over others of the same sex and species. c. favors monogamous mating systems. d. leads to the investment of parental care of offspring. e. is not a type of natural selection.
Which one of the following is not important to the concept of homology?
A. Features must share a common developmental pattern. B. Species with homologous features must be related. C. Homologous features must be found in a common ancestor. D. It can include anatomical, physiological, or molecular features. E. None of the features being compared can be vestigial.