If a population contains 800 individuals and documents 400 cases of measles within the population, what is the prevalence rate?
A) 50% B) 80% C) 60% D) 40% E) 30%
Answer: A
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Intrinsic properties of immunogens include
A) appropriate physical form. B) molecular size. C) sufficient molecular complexity. D) appropriate physical form, molecular size, and molecular complexity.
Why is a selectively permeable membrane so important to living things?
A) It allows cells to attach to adjacent tissues. B) It provides a good barrier between the inside and outside of the cell. C) Proteins will avoid a selectively permeable membrane. D) The membrane may absorb several times its weight in cholesterol. E) All of the above.
A process unique to angiosperms is
a. single fertilization b. double fertilization c. syngamy d. alternation of generations e. seed productions
The __________ develops into a corpus luteum
a. zona pellucida b. uterine wall c. primary oocyte d. secondary oocyte e. follicle