Which of the following designates a normal human female?
a. XXY
b. XY
c. XX
d. XYY
e. XO
C
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The unfolding of a protein by heat or chemical treatment is referred to as:
A. disaggregation. B. uncoupling. C. denaturation. D. hydrolysis. E. depolymerization.
An infected intravenous (IV) catheter tip grew out gram-positive cocci, which were catalase positive and coagulase negative. The zone size of the novobiocin disk measured 18 mm. The most likely organism causing infection is:
a. S. saprophyticus. b. S. epidermidis. c. S. hominis. d. S. cohnii.
Within one or two weeks after infection with Plasmodium, ruptured liver cells release _____ and cellular debris into
the host's bloodstream, causing fever and weakness characteristic of malaria. a. sporozoites b. merozoites c. Anopheles mosquitoes d. gametocytes e. zygotes
The first land plants were bryophytes, which then branched into ferns, gymnosperms, and finally angiosperms. What advantage did angiosperms have over gymnosperms?
a. Angiosperms can produce flowers and fruits to aid in seed dispersal b. Angiosperms produce pollen and do not require water to reproduce c. Angiosperms go through alternation of generations d. Angiosperms have a vascular system, this allowed them to grow taller e. The angiosperms can produce spores which are more stable than seeds from gymnosperms