An antigen that promotes an immune response that is greater than necessary is called a(n)
A. antibody.
B. mast cell.
C. allergen.
D. MHC.
Answer: C. allergen.
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Ocean acidification is being caused by
a. global warming. b. nitrogen fertilizer runoff. c. phosphorous fertilizer runoff. d. transfer of carbon dioxide from atmosphere to ocean. e. transfer of carbon dioxide from ocean to atmosphere.
Define apoptosis and explain its role in normal development. What will be an ideal response?
Above the temperature at which lipids are fluid, membrane proteins are able to move
a. from inner to outer surfaces of a membrane. b. laterally in the plane of a membrane. c. from apical to basal surfaces of intestinal epithelial cells. d. only if attached to microtubules or microfilaments.
The rediscovery of Mendelian inheritance caused increased scrutiny of Darwin's theory of natural selection because of an apparent conflict in the two concepts
This conflict was based on the observation that Darwin focused on continuous traits, while Mendelian genetics deals with: a. discrete characters. b. alleles. c. flowers. d. genotypes. e. All of the above.