Q: Fact 1: Nitrogen is found in proteins, nucleic acids, and chlorophyll. Fact 2: Chloroplasts are the structures which manufacture chlorophyll. Given the two facts above, what is produced by chloroplasts?

OPTIONS:
- oxygen
- sunlight
- blood
- Energy
- glucose
- gasoline
- Energy.
- nitrogen

A: nitrogen

Q: Fact 1: Courtship is behavior that is intended to attract a mate. Fact 2: Birds sing to defend territories and attract mates. Given the two facts above, how do birds court and defend territories? ?

OPTIONS:
- Summer
- sound
- ligt
- singing
- mechanical
- movement
- exercise
- autumn

A: singing

Q: Fact 1: Viruses are so small that they can be seen only with an electron microscope. Fact 2: Once the camera is tuned with the microscope, the focusing depends on the microscope lens. Given the two facts above, viruses are so small that they can be seen by what?

OPTIONS:
- focusing a lens
- A computer
- looking close
- rays or beams
- sunlight
- bending light rays
- seeing smaller
- tuning eyes

A: focusing a lens

Q: Fact 1: Most salamanders use their sense of smell to find a mate. Fact 2: Olfaction is the sense of smell. Given the two facts above, what do most salamanders use to find a mate?

OPTIONS:
- olfaction
- sound
- seduction
- fur and fat
- heat energy
- air
- environment
- water

A:
olfaction