Self-paced
Hemoglobin, a substance in human blood, transports oxygen from the lungs to the rest of the body. ████ ████ ██████ ████████ ██ █████ ███ █ ██████████ ████████ ███████ ████ █████████ ██ ███████ ██ ██████████ ██████ █████████ █████ ███ ███████ ████████ ██ ████ ██████ █████████ ██ ████████ ████████ ██ ██████ ████████ ███████ ███ █████ ██ ███ ██████████ █████████ ████ ████ ███████ ██ █████████ ██ ████ ██████ ██ ███████ ████ ███████
Summary
Hemoglobin transports oxygen from the lungs throughout the body. As it picks up more oxygen molecules, a hemoglobin molecule becomes more effective at picking up additional oxygen molecules until it reaches its capacity of four. Grabbing an oxygen molecule changes the shape of the hemoglobin molecule, making it easier to receive more oxygen.
Strongly Supported Conclusions
A hemoglobin molecule with more oxygen is more effective at picking up oxygen molecules than a hemoglobin molecule with fewer oxygen molecules.
3.
Which one of the following ██ ████ ████████ █████████ ██ ███ ███████████ ██████
a
A hemoglobin molecule ████ ███ ██████ ██ █████ ██████ █████████ ████ ████████ ███████ █ ██████ ██████ █████████
This is too strong to support. The stimulus says that it becomes increasingly likely to pick up an additional oxygen molecule but does not state that it is likely.
b
The only factor ███████████ ███ █████████ █ ██████████ ████████ ██ ██ ███████ ██ ██████ █████████ ██ ███ ████ ███ █████ ██ ████ ██████████ ████████ ███
This is too strong to support. The stimulus says that the shape of a hemoglobin molecule plays a factor, not that it is the sole factor.
c
A hemoglobin molecule ████ ███ ██████ ██ █████ ██████ █████████ ████ ██ ████ █████████ ██ ███████ ██ ███████ ██████ ████████ ████ ████ █ ██████████ ████████ ████ ███ ██████ ██ ████ ███ ██████ █████████
This comparative statement is supported because the stimulus says that a hemoglobin molecule becomes increasingly effective at picking up more oxygen molecules the more molecules it already has.
d
A hemoglobin molecule ████ ███ ██████ ██ ████ ██████ █████████ ████ ████ ███ ████ █████ ██ █ ██████████ ████████ ████ ███ ███ ██████ ██ ███ ██████ ██████████
There is no information about the kind of shape a hemoglobin molecule has.
e
Each hemoglobin molecule ██ █████ █████ █████ ██ ███████ ███ ███ ████ ██████ █████████ ██ ██ ████ ███ █████ ███ ██████████ ████ ██ ████ █████ ████ ██ ███ █████
It is possible that a hemoglobin molecule does not pick up any oxygen molecules. No information specifies that a hemoglobin molecule has to pick up between one and four oxygen molecules.