Which chamber of the heart does the blood first enter when it returns from the pulmonary circuit?
a. the left ventricle
b. the right ventricle
c. the right atrium
d. the left atrium
Ans: d. the left atrium
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What role does wind play in desertification?
a. Wind disperses seeds. b. Wind blows away topsoil. c. Wind impedes grass growth. d. Wind damages mature grasses of grasslands. e. Wind causes drought.
What is the difference between F+ and F– bacteria?
What will be an ideal response?
Which of the following is the best definition of fermentation?
A) the partial reduction of glucose to pyruvic acid B) the partial oxidation of glucose with organic molecules serving as electron acceptors C) the complete catabolism of glucose to CO2 and H2O D) the production of energy by oxidative-level phosphorylation E) the production of energy by both substrate and oxidative phosphorylation