Allergies are hypersensitivities to substances that ordinarily would do no harm to the body.
Answer the following statement true (T) or false (F)
True
It is true that allergies are hypersensitivities to substances that ordinarily would do no harm to the body.
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Which are the thinnest blood vessels?
A. Capillaries B. Arterioles C. Venules D. Bronchioles
Which of the following statements concerning a secondary immune response is false?
a. It is a response to an antigen. b. It may occur years after a primary response. c. It involves memory cells. d. It has a longer latent period than a primary response. e. It is stimulated by less antigen than in a primary response.
A NASA probe returned samples of rocks from the surface of Mars. From these rocks, a prokaryotic organism was isolated and remained viable under conditions similar to those of Mars
The organisms are capable of dividing to replicate themselves. In order to determine whether the DNA replication of these organisms was semiconservative, an experiment using N15/N14 (similar to that of Meselson and Stahl) was performed. If the method of DNA replication were conservative, after one generation one would expect to see A) all of the DNA in the heavy (N15) band. B) all of the DNA in the light (N14) band. C) all of the DNA at a point midway between the heavy and light bands. D) half of the DNA in the light band, the other half in the heavy band. E) None of these are correct.
Inhibitory neurotransmitters are most like what part of an automobile?
A) brakes B) radio C) muffler D) engine