For an adult, average blood volume is about ____
a. 1-2 liters
b. 2-3 liters
c. 3-4 liters
d. 4-5 liters
e. more than 6 liters
ANSWER: d
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Due to a rapid change in the environment, a population of ants was reduced from 1 million to 1
thousand. What type of genetic drift will occur in the gene pool of this population when it expands again? a. the founder effect b. migration c. a genetic bottleneck d. gene flow e. natural selection
Pyramids of numbers are of limited usefulness because they:a
do not indicate the biomass of the organisms at a given time. b. do not indicate the gross primary productivity of each species. c. do not include energy flow through the ecosystem. d. include three trophic levels. e. None of the answer choices is correct.
Who discovered transformation?
a. Gregor Mendel b. Fred Griffith c. Elie L. Wollman d. Joshua Lederberg
Which of the following terms describes NO3- ? NO2- ? N2O ? N2?
A) ammonification B) denitrification C) nitrification D) nitrogen fixation E) anaerobic respiration