Graph Practice Graph 1 :
Health Effects
of CO on Humans
NO
70
Hemoglobin Combined with CO (99)
8 8 8 8 8 8 8 8 8
I
100 200 MD AO SOO BOD 700 HOO OO 10GO
Concentration of CO in Air
(parts/million)
1. What is the Independent Variable?
2. What is the Dependent Variable?
3. According to the graph, about what percentage of hemoglobin is bound to CO at a CO
concentration of 700 parts per million?
a. 25%
b. 35%
C. 40%
d. 55%

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the correspondingbones in whales have very different shapes and proportions. however, genetic data suggest that all three kindsof organisms diverged from a common ancestor at about the same time. which of the following is the mostlikely explanation for these data? a) humans and bats evolved by natural selection, and whales evolved by lamarckian mechanisms. b) forelimb evolution was adaptive in people and bats, but not in whales. c) natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy. d) genes mutate faster in whales than in humans or bats. e) whales are not properly classified as mammals.