Argentine fire ants entered the United States in
the
a. 1920s.
b. 1930s.
c. 1940s.
d. 1950s.
e. 1960s.
B
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Prosimians are:
A. small, primitive primates B. professional animal trainers C. primitive australopithecines D. the most advanced primates E. none of the choices provided
After one minute without oxygen, brain cells begin to die. After three minutes, this damage is likely to cause severe
neurological deficits. The dependence of brain cells on oxygen for survival indicates that these cells are ____.
a. strict aerobes b. strict anaerobes c. facultative aerobes d. facultative anaerobes e. transitional aerobes
In ecosystems, primary consumers are:
a. herbivores b. carnivores c. scavengers d. decomposers e. detritivores
Which of the following elements is NOT responsible for a significant portion of the mass of living
organisms? a. O b. S c. N d. H e. C