Cell Mediated Immunity (CMI) is mediated by

A. lymphocytes
B. antibodies
C. opsonins
D. neutrophils
E. the complement


Ans: A. lymphocytes

Biology & Microbiology

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Suppose a human population exhibits a Type III survival curve. What would you expect to happen to the curve over time if further dramatic improvements in medical technology take place?

What will be an ideal response?

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Ascomycetes are the largest group of fungi. When their haploid hyphae fuse without fusion of their nuclei, the resulting cells are

A. asexual. B. haploid. C. asci. D. diploid. E. dikaryotic.

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Which of the following regarding the Spemann organizer is true? (Check all that apply.)  

_____  Signaling molecules from the organizer inhibit ventral development. _____  The dorsal lip cells directly activate dorsal development. _____  The organizer determines the dorsal-ventral axis. _____  The organizer forms in the area of the grey crescent. _____  The point of sperm entry determines the orientation of the organizer.

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Nutrient deficient aquatic ecosystems are called ________.

A. hypotrophic B. oligotrophic C. eutrophic D. autotrophic E. epitrophic

Biology & Microbiology