At an altitude where atmospheric pressure is 500 mm Hg, what is the partial pressure of oxygen?
A) 100 mm Hg
B) 105 mm Hg
C) 630 mm Hg
D) 760 mm Hg
E) 800 mm Hg
Answer: B) 105 mm Hg
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Indicate whether the statement is true or false
If pollen of one species of plant lands on the stigma from another species, then ________
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