Beneficial relationships between two organisms, like the one observed between the cacao tree and endophyte fungi, are examples of
A. mimicry.
B. parasitism.
C. competition.
D. commensalism.
E. mutualism.
E. mutualism.
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Women died after childbirth of
A. S. aureus intoxication. B. toxic shock syndrome. C. Klein's disease. D. puerperal fever.
Specific targeting of an antigen is a
characteristic of which line of defense?
a. first b. second c. third d. all of these e. none of these
In the light microscope, DNA molecules are most visible in which of the following?
a. in the form of euchromatin b. in a cell that is dividing c. when they are in their most extended form d. during interphase e. when they are stripped of histones
Where does normal fertilization of an egg by a sperm in a human female occur?
A. In the Fallopian tube B. Near the cervix before the egg leaves the female C. In the uterus before the egg has implanted D. At the ovary upon ovulation E. In the uterus after the egg has implanted