Is natural selection the same thing as evolution?
A. Yes, they are the same because they both
change populations.
B. No, they are not the same because natural
selection works on individuals, whereas
evolution is change in populations.
C. Yes, they are the same because they both
involve phenotypes and genotypes.
D. No, they are not the same because natural
selection has never been observed.
B
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Neurons that carry messages within the CNS are
(a) sensory. (b) motor. (c) interneurons. (d) autonomic.
Molecular studies place ____ as the sister clade of vascular plants
a. ferns b. mosses c. liverworts d. hornworts e. stone worts
An F' plasmid results when
A. an integrated F plasmid is incorrectly excised, bringing host genes with it. B. an F+ × F- mating is interrupted before completion. C. an Hfr × F- mating is interrupted before completion. D. None of the choices are correct.
An individual uses an in-home test kit one week after engaging in high-risk behavior for HIV infection. The test kit uses a saliva sample that is mailed to a lab where an agglutination test to detected HIV antibodies is run. The results come back
negative for HIV. What should the patient consider regarding these test results? A) One week may not be enough time for HIV antibodies to be detected. B) Agglutination tests will not detect viruses if the infection is latent, nor are they appropriate for testing samples of body fluids. C) Agglutination tests are not appropriate for testing samples of body fluids. D) Agglutination tests will not detect viruses if the infection is latent. E) An ELISA test is needed to detect the presence of HIV nucleic acid.