The polymerase chain reaction (PCR) can be used to produce ________ of copies in a few hours.
A. thousands
B. billions
C. hundreds
D. millions
Answer: B
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In muscle tissue, protein consumed in the diet but not immediately used is stored as adipose tissue
A. true B. false
A single oak tree can support hundreds of beetles, caterpillars and other primary consumers. Such a phenomenon is an example of
A. a pyramid of biomass. B. excessive levels of primary production. C. an unusually diverse group of primary consumers. D. primary parasitism. E. an inverted pyramid of numbers.
Chemicals released by metabolically active cells will cause which of the following?
A) contraction of arteriolar smooth muscle to decrease blood flow B) contraction of capillary smooth muscle to increase blood flow C) contraction of arteriolar smooth muscle to increase blood flow D) relaxation of capillary smooth muscle to decrease blood flow E) relaxation of arteriolar smooth muscle to increase blood flow
What is not a function of the integumentary system?
A. Protection from injury B. Protection from pathogens C. Excretion of some wastes D. Protection against dehydration E. Exchange of gases