Fact 1: Hydrogen bonds cause water to expand when it freezes. Fact 2: Freezing water expands with tremendous force. Given the two facts above, hydrogen bonds cause a tremendous force when a substance does what?

OPTIONS:
- strong
- moves
- harm
- expelled
- freezes
- heat
- breakdown
- propagate

Answer: freezes

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?

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

Answer: mold

Fact 1: Adult tunicates are barrel-shaped. Fact 2: Tunicates, or sea squirts, are marine organisms covered with a gelatinous tunic. Given the two facts above, what adults are barrel-shaped?

OPTIONS:
- offspring
- fertile
- barnacles
- Length
- insects
- sea squirts
- humans
- beer

Answer: sea squirts

Fact 1: When light enters the eye through the pupil , that light falls on the retina. Fact 2: Pictures are formed on the retina, and are then transmitted by the optic nerve to the brain. Given the two facts above, when light enters the eye through the pupil, what structure transmits information to the brain?

OPTIONS:
- an electron lens
- vision
- coded genes
- iris
- optic nerve
- Neuron.
- nerves
- aperture

Answer:
optic nerve