The most important factor that determines how much oxygen is bound to hemoglobin is ____
a. plasma volume
b. breathing rate
c. temperature
d. relative amounts of oxygen and carbon dioxide
e. acidity
ANSWER: d
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A plant of genotype CCdd is crossed to a plant of genotype ccDD; the F1 offspring are then testcrossed to a ccdd
plant. If the genes are on different chromosomes, what percentage of the offspring will be ccdd?
a. 10 b. 20 c. 25 d. 30 e. 50
If a mutation prevented the formation of lignin, which tissue would be most affected?
a. vascular cambium b. parenchyma c. collenchyma d. sclerenchyma e. mesophyll
What amount of the fluid removed from the blood is eventually returned to the blood?
a. about 59 percent b. less than 90 percent c. almost 99 percent d. a mere 0.9 percent e. exactly 9 percent
Given that mass loss is expressed as a negative exponential function (original mass remaining = e-kt), how much mass would be left after 20 weeks given a decomposition coefficient k = 0.0167 in units of proportion mass loss per week?
A) 0.203 B) 0.716 C) 0.916 D) 1.390