Question: 12. A relationship between organisms in which the waste product of one provides nutrients for another is called a. mutualism. b. competition. c. synergism. d.

12. A relationship between organisms in which the waste product of one provides nutrients for another is called
a. mutualism.
b. competition.
c. synergism.
d. commensalism.

13. Which of the following sites of the human body does not have a normal flora?
a. Intestine
b. Skin
c. Vagina
d. Blood

14. Which of the following lack nucleic acids?
a. Archaea
b. Viruses
c. Prions
d. Bacteria

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