Histamine ________
A) causes local blood vessels to dilate
B) attracts natural killer cells
C) stimulates the release of defensive proteins
D) repels phagocytic cells
A
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A recipient cell that is temporarily diploid for a portion of the genome during the replacement process is called a(n) ________.
A. exogenote B. merozygote C. endogenote D. None of the choices are correct.
The greatest concentration of nitrogen on the planet Earth is found in:
a. living organisms, including bacteria b. the atmosphere c. soil minerals d. fossil fuels e. oceans
Helicobacter pylori has been associated with ____
a. irritable bowel syndrome b. duodenal ulcers c. peptic ulcers d. HPV e. GERD
What might be the predominant lifestyle on Earth?
A. parasitism B. mutualism C. predation D. commensalism E. herbivory