Adult stem cells are found only in adults. Indicate whether the statement is true or false
False - umbilical cords, infants, children, and adults
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Which of the following is true about temporal variation in community biomass?
A. It cycles faster in communities with low species richness. B. It increases with increases in species richness. C. It decreases with increases in species richness. D. It cycles faster in communities with high species richness. E. It is usually low because community biomass is very stable over time.
Compared to uric acid, using urea as the main form of nitrogenous waste requires
a. more energy and water. b. less energy and water. c. more energy and less water. d. the same amount of energy and water. e. less energy and more water.
Birds and mammals are both warm-blooded, and are
A. parsimonious. B. paraphyletic. C. common ancestors. D. polyphyletic. E. monophyletic.
The sum total of all the genes in an interbreeding population is the gene pool. Indicate whether the statement is true or false