The viral envelope closely resembles the
A. prokaryotic cell wall.
B. capsomere.
C.
eukaryotic cellular membrane.
D. cytoplasm.
C
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Genes located along the X chromosome:
A. have a full set of complementary alleles on the Y chromosome. B. are called X-linked genes. C. are contributed solely by the female parent. D. are always recessive to genes located on the Y chromosome.
Which is true about prokaryotic (bacterial) RNA polymerase?
A. It is used during transcription. B. It does not require a primer. C. It has a detachable subunit, sigma factor, which recognizes the promoter. D. It reads the template in the 3'-5' direction. E. All of the choices are true.
Clayton and colleagues (2003 ) examined the frequency of host shifts observed among both wing feather and body lice that infect doves
They observed that body lice rarely shift host species, whereas wing feather lice often shift from one species to another. The higher frequency of host shifts observed in wing feather lice is due to the observation that ________. A) wing feathers containing lice molt frequently, and are frequently used by other hosts to build nests B) body feathers do not come into contact with other hosts as frequently as wing feathers C) the lice that infect wing feathers often move from host to host on a parasitic fly D) doves preen each other's wing feathers at a higher frequency than body feathers
An anion is formed when
A) an atom gains one or more negatively-charged electrons. B) an atom loses one or more positively-charged protons. C) an atom loses one or more negatively-charged electrons. D) an atom gains one or more positively-charged protons. E) an atom has an equal number of positively-charged protons and negatively-charged electrons.