Fluid inside vessel elements is being pulled
upward primarily by
a. turgor pressure.
b. negative pressures from the atmosphere
(tensions).
c. osmotic gradients.
d. pressure flow forces.
e. active transport
B
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The indirect ELISA test is commonly used to diagnose infections caused by all of the following except ________.
A. HIV B. hepatitis A virus C. hepatitis C virus D. Helicobacter E. rubella virus
The original atmosphere of Earth is thought to have been rich in
a. CO2, N2, H2, H2S, and CO. b. CO2, N2, O2, Ar, and Ne. c. CO2, N2, O2, Rn, and Ne. d. CO2, N2, H2, Kr, and Xe.
Which of the following statements about fungi is FALSE?
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Gums bleeding while brushing one's teeth is most commonly associated with
A) halitosis. B) cavities. C) gingivitis. D) periodontitis. E) trench mouth.