What was the most important factor in restoring the Curtis Prairie at the University of Wisconsin, Madison?
A. removal of alien intruders
B. reintroduction of native bison
C. planting seeds
D. periodic fires
E. allowing domestic livestock to disperse seeds
Answer: D. periodic fires
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Indicate whether the statement is true or false.
Antibodies are
a. proteins. b. steroids. c. polysaccharides. d. lipoproteins. e. any of these
An example of mutualism is:
a. mycorrhizae and epiphytes. b. epiphytes and tapeworms. c. monarch and viceroy butterflies. d. silverfish and army ants. e. Rhizobium and legumes.
When chromosomes replicate
A) the original DNA is distributed to the two daughter cells, with no new DNA synthesized. B) the two DNA strands separate and each is used as a template for synthesis of a new strand. C) one strand of the DNA is completely replicated first, and then the second strand is replicated. D) new DNA synthesis occurs in only one location along the entire DNA molecule.