The rotifers and the aquatic environment in which they live would be considered a(n)
__________.
a. ecosystem
b. community
c. population
d. keystone
A
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Choose the letter of the best match: Surgical intervention
A. birth control pill B. intrauterine device C. diaphragm D. foams and jellies E. vasectomy
HeLa cells have been used in research to
a. identify viral strains. b. investigate cancer. c. study the effects of radiation on cells. d. develop tissue culture techniques that produced a polio vaccine. e. all of these.
A change in the gene pool due to chance results in ________.
A. environmental variation B. natural selection C. genetic drift D. a large gene pool
According to Kluyver and van Niel, which of the following are TRUE of basic biochemical reactions?
A) They are shared by all living things. B) There are an unlimited number of them. C) They primarily involve the transfer of electrons and ions. D) Basic biochemical reactions shared by all living things primarily involve transfer of electrons and hydrogen ions. E) They primarily involve transfers of chemical groups.