[Q]: When a balloon is filled with air and suddenly released, it will fly around the room as the air escapes. If compared to space transportation, the escaping air is most similar to what subsystem of a spacecraft?
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OPTIONS:
- guidance
- propulsion
- support
- suspension
****
[A]: propulsion

[Q]: Which outcome is most likely if a person consumes more Calories than needed for daily activities?
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OPTIONS:
- weight loss
- weight gain
- deficiency disease
- infectious disease
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[A]: weight gain

[Q]: Which group of organisms can show significant trait changes in the shortest period of time?
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OPTIONS:
- bacteria
- birds
- fish
- reptiles
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[A]:
bacteria