What is the purpose of an enzyme? Select all the correct choices
A. to increase the rate of a specific reaction
B. to decrease the transition state
C. to alter the equilibrium of a specific
reaction
D. to both increase the rate of a specific
reaction and decrease the transition state
Answer Key: D
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Amphibians can accomplish gas exchange using ____
a. gills only b. lungs only c. respiration through the skin only d. both gills and lungs e. gills, lungs, and respiration through the skin
Which of the following is true regarding some insect tracheal systems?
a. They are associated with the blood circulatory system. b. They excrete body wastes as well as transport gases. c. Their spiracles can become clogged by spraying them with oil. d. The tracheal tubes are continually open in large terrestrial insects. e. They contain respiratory pigments to enhance oxygen transport.
After blood flows through the right atrium of the heart, its next major destination is the
A) right ventricle. B) left atrium. C) aorta. D) left ventricle. E) lungs.
Yamill was researching early maturation in girls; some of the information she gathered regarded early puberty in girls and girls who were abandoned by their fathers. What was the link between paternal abandonment and early puberty in girls Yamill may have determined by her research?
a. flight b. rumination c. "kindling" d. genetic