In the research on monkey-flower speciation, researchers found that mutations in as few as ____ genes
could result in speciation.
a. 2
b. 4
c. 8
d. 16
e. 25
C
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Both stages of photosynthesis occur in the daytime in _____ percent of plants
a. 10 b. 50 c. 90 d. 100
Which of the following characteristics do fungi share with plants?
a. Their cell walls both use cellulose to keep their structure. b. They both have chloroplasts. c. Their cells both have cell walls. d. Their plasma membranes are both stabilized by ergosterol.
Which of the following regarding antigens is true?
A. A large antigen is likely to have many different epitopes, each of which can stimulate a distinct immune response. B. An antigen is a molecule which promotes a general immune response. C. Bacteria do not contain antigens. D. Antigens can only be recognized by their lipid moieties. E. The most effective antigens are small simple amino acid complexes.
Competitive exclusion is the result of
a. mutualism. b. commensalism. c. competition. d. predation. e. parasitism.