What is the function of valves in the veins?
A. remove debris from the blood
B. oxygenate the blood
C. regulate blood pressure
D. prevent the backward flow of blood
E. increase the rate of blood flow
Answer: D
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A soil that lacks a dominate particle size is referred to as a(n)
A) aggregation. B) bisequum. C) loam. D) mottled soil.
In cells, condensation reactions link subunits, called ________, into large molecules called ________
a. functional groups / organic molecules b. atoms / functional groups c. polymers / monomers d. monomers / polymers
A radiation dose of 400 rem, if untreated, causes death within 60 days of about
____________________ percent of people exposed to it. Fill in the blank(s) with the appropriate word(s).
The reactants of the light-dependent reactions are:a
H2O, ADP, and NADP+. b. CO2, ADP, and NADP+. c. H2O, ATP, and NADPH. d. CO2, ADP, and NADPH. e. H2O, CO2, and NADP+.