Which process involves antibodies cross-linking cells or particles into large aggregates?
A. anamnestic response
B. complement fixation
C. opsonization
D. agglutination
E. neutralization
Answer: D
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The extinction vortex
A. is what happens as a population decreases and becomes more vulnerable to extinction from a variety of causes. B. begins when one species in an ecosystem goes extinct and other species follow. C. is what happens when competing species fight over a single niche, often driving both species to extinction. D. is a spiral of events that occur once a species has become overcrowded through excess reproduction. E. is a spiral of events that includes introduction of competing species, overexploitation, and disease, in that order.
The number of sperm cells that form from a primary spermatocyte is
A) 2. B) 4. C) 16. D) 100.
If two organisms are in the same phylum, they must also be in the same:
a. class b. species c. family d. kingdom
Why would a tall woman be at less risk of osteoporosis than a short woman, yet both would be at higher risk than a man?
What will be an ideal response?