From which blood vessels are materials exchanged between blood and body tissues?

A. capillaries
B. veins
C. arteries
D. arterioles


Answer: A

Environmental & Atmospheric Sciences

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By measuring the 18O/16O ratio of water in ice cores or shells in fossil shells, geologists can recover the temperature changes in Earth's history.

a. true b. false

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The first trophic level in a hydrothermal vent community is ________.

A. dependent on organic material drifting down from the surface B. made up of clams and tube worms C. seriously polluted D. dependent on bacteria and their ability to use hydrogen sulfide E. provided by larvae drifting in deep-sea currents

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Which of the following hold the DNA and histones together in nucleosomes?

A) covalent bonds B) dipole-dipole interactions C) hydrogen bonds D) ionic forces

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The winds aloft in the middle latitudes of the Southern Hemisphere generally blow?

a. ?from west to east. b. ?from east to west. c. ?from north to south. d. ?from south to north. e. ?in any of the above directions.

Environmental & Atmospheric Sciences