Problem:OPTIONS:
- heat
- Air
- water
- carbon monoxide
- carbon dioxide
- oxygen
- Energy.
- Energy

Fact 1: Plants release oxygen during the day but not during the night. Fact 2: Another kind of plant is the fishhook cactus. Given the two facts above, what does the fishhook cactus release during the day but not during the night.?
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A: oxygen

Problem:OPTIONS:
- depress neuronal excitability
- energy of moving objects
- The revolution around earth
- our nearest star
- a hemisphere is tilted away from the sun
- focusing a lens
- flow of electrons
- that material's properties

Fact 1: The moon revolving around the Earth causes the phases of the moon. Fact 2: Phases of the Moon are caused by differing amounts of light reflected from the Earth. Given the two facts above, what causes differing light to reflect off of the moon?
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A: The revolution around earth

Problem:OPTIONS:
- amoeba
- bats
- mammals
- sound waves
- gamma rays
- ferns
- mold
- maples

Fact 1: Fungi have special structures for penetrating a host. Fact 2: Fungi include yeasts, molds, and fleshy fungi. Given the two facts above, what have special structures for penetrating a host?
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A: mold

Problem:OPTIONS:
- seasons
- ligt
- relocation
- Movement
- friction
- erosion
- heat
- climate

Fact 1: Earth 's tilt on its rotating axis causes seasons to change. Fact 2: Seasons are caused by the motion of the Earth around the Sun and the tilt of the Earth's axis. Given the two facts above, what does axial tilt cause?
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A:
seasons