The antimicrobial aspect(s) of the skin is/are
A. dryness.
B. saltiness.
C. acidity.
D. toxicity.
E. All of the choices are correct.
E
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Which birth control method is the most effective in protecting against sexually transmitted diseases?
a. abstinence b. the Pill c. condoms d. an IUD e. the rhythm method
Which process would enable a white blood cell to ingest a bacterium?
A. osmosis B. diffusion C. phagocytosis D. receptor-mediated endocytosis E. pinocytosis
During a period of low water availability, the prokaryotic structure that would protect a cell from desiccation (drying out) is the
A. nucleus. B. glycocalyx. C. pili. D. plasma membrane.
During the light reactions of photosynthesis:
A) CO2 is fixed into glucose. B) H2O is oxidized to oxygen and hydrogen ions. C) ATP is used to produce NADPH. D) ATP is used to produce H2O.