Which of the following forms of oxygen is often used by phagocytic cells to destroy pathogens?
a) singlet oxygen
b) superoxide radicals
c) hydroxyl radicals
d) peroxide anions
Answer: a) singlet oxygen
Biology & Microbiology
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A milkweed plant discourages consumption by herbivores by ____
a. exuding a toxic sap b. developing an appearance that mimics an undesirable plant c. having hairy leaves d. producing an undesirable scent e. having thorns
Biology & Microbiology
What is the name for an association of fish that exhibit behaviors for social reasons?
a. Synchronization b. Shoaling c. Catadromous d. Anadromous
Biology & Microbiology
How small is the smallest object that can be seen with a light microscope?
a. 2 µm b. 0.2 µm c. 2 nm d. 0.2 nm
Biology & Microbiology
Which of the following is part of the body's second line of defense?
A. Vomiting B. Saliva C. Phagocytosis D. Cytotoxic T-cells
Biology & Microbiology