Inflammation helps to fight infection by
A) creating an environment in the body that is hostile to pathogens.
B) producing antibodies that kill viruses and bacteria.
C) limiting the number of phagocytes at the infection site.
D) producing collectins, cytokines, and red blood cells.
A) creating an environment in the body that is hostile to pathogens.
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Aside from using light as a source of energy, another important part of the functional diversity of some bacterial phototrophs is their ability to
A) bioluminesce. B) form prosthecate and stalked cells. C) fix nitrogen gas. D) degrade neurotoxins.
Inhalation of respiratory secretions is involved in the transmission of all of the following except ________.
A. legionella B. influenza C. SARS D. diphtheria E. rhinitis
Gene flow through migration ________
A) has no effect on allele frequencies of populations B) can go only in one direction C) may have the largest impact on small populations, such as those on islands D) maintains the Hardy-Weinberg equilibrium
What type of RNA carries the information that specifies a protein?
A. transfer RNA B. ribosomal RNA C. messenger RNA D. double-stranded RNA E. complementary RNA