What is the function of white blood cell granules, which are present in eosinophils, neutrophils, basophils, and mast
cells?
a. to phagocytize pathogens and cellular debris
b. to release cytokines, digestive enzymes, and toxins that kill parasites
c. to activate killer T cells
d. to develop into dendritic cells that phagocytize pathogens
e. to act as memory cells for B lymphocytes
ANSWER: b
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Which of the following is evidence that the
continents are not static?
a. the jigsaw puzzle fit of continents like South America and Africa b. fossils occur in identical rock formations on both sides of the Atlantic Ocean c. magnetic poles of large rock formations point in different directions d. at certain places beneath the ocean, the sea floor is spreading e. all of these are evidence that the continents are not static
The outcome of cleavage during embryonic development is the production of a
A. substantially larger embryo. B. gastrula. C. blastula. D. neurula. E. None of the choices are correct.
In the "typical" menstrual cycle, day 13 or 14 is when
A) the corpus luteum disintegrates. B) progesterone levels peak. C) menstruation begins. D) ovulation occurs. E) estrogen levels reach their lowest point.
Order the following choices to reflect the organization of taxa, from the most general to the most specific, to test your understanding of levels of classification.
> Order > Phylum > Species > Domain