In which of the following environments do hemoglobin molecules show decreased oxygen affinity?
A. the more basic environment of a resting tissue
B. the more basic environment of an active tissue
C. the more acidic environment of a resting tissue
D. the more acidic environment of an active tissue
Answer: D
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Why is the west coast of North America 500 km west of where it was about 540 million years ago?
A) plate movement B) accretion of exotic terrains C) thrust and uplift of continental crust D) volcanic eruptions
According to Figure 13.29, where did the oldest crust in North America form?
A) in northern Canada B) in southern Mexico C) in the Western Cordillera D) on the east side of the continent
Which of the following is true of all strong electrolytes?
A) They are all ionic compounds. B) They all dissociate completely. C) both a and b D) neither a nor b
What are two of the four questions that geographers ask to analyze topography?
What will be an ideal response?