Blood flowing back to the heart travels in
A. capillaries.
B. veins.
C. arteries.
D. all of the above
Answer: B
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Which of the following must we know when we carry out a titration?
A) the concentrations of all reactants except one B) the stoichiometric ratio of the reactants C) the volumes all reactants D) all of the above
The majority of the water outside of the oceans is in the form of:
A) groundwater. B) glacial ice. C) lakes. D) streams. E) water vapor in the atmosphere.
Cis-trans isomers do not exist for which of the following compounds, all of which have the molecular formula C3H4Br2?
A) 1,1-dibromopropene B) 1,2-dibromopropene C) 1,3-dibromopropene D) They do not exist for any of these three molecules.
The tidal current in a narrow tidal channel is likely to ________.
A. change direction as the tides change B. be unidirectional at all times C. have a distinct rotary component D. be nonrotary E. change direction as the tides change and be nonrotary