Most of the carbon dioxide in the blood of humans is transported
A. as dissolved CO2 in plasma.
B. as bicarbonate ion in plasma.
C. attached to hemoglobin in red blood cells.
D. attached to hemoglobin in plasma.
E. as carbonic acid.
B. as bicarbonate ion in plasma.
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Passage of Vibrio cholerae through the human body results in reduced infectivity for the next human host.
Answer the following statement true (T) or false (F)
Experiments like those performed by Stanley
Miller in the 1850s demonstrated
a. that DNA forms readily and produces itself. b. that organic compounds required for life can form under artificial conditions. c. that prokaryotic cells can form under artificial conditions. d. that meteorites contain the building blocks of life. e. that reactions in hydrothermal vents synthesis organic molecules
The characteristic ____________________ of a radioisotope allows us to determine the age of rocks and fossils using
a technique called ____________________. Fill in the blank(s) with the appropriate word(s).
The forced inhalation volume is equal to about
__________ milliliters. a. 500 b. 1,100 c. 2,900 d. 3,400 e. 4,700