Which of these is not produced by phagocytes to destroy engulfed microorganisms

a. hydroxyl radicals
b. superoxide anion
c. hydrogen peroxide
d. histamine


Ans: d. histamine

Biology & Microbiology

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The physical structure that is formed when two chromatids cross over is called a(n) _______

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The female plant structure on which a pollen grain must land for sexual reproduction to occur is the:a

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Skeletal muscle and cardiac muscle are similar in that they are both

a. made of highly branched cells. b. made of long parallel cells. c. striated. d. under involuntary control. e. under voluntary control.

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