input with options: Q: Models may be physical, conceptual, or what else? A:
OPTIONS:
- experimental
- fundamental
- theoretical
- mathematical
output: mathematical

input with options: Q: What decides what may enter or leave a cell? A:
OPTIONS:
- nucleus
- cell wall
- golgi apparatus
- cell membrane
output: cell membrane

input with options: Q: What term is used to describe the line of latitude right in the middle of the planet? A:
OPTIONS:
- Prime Meridian
- orbital
- pole
- equator
output: equator

input with options: Q: Maintaining a high metabolic rate takes a lot of what? A:
OPTIONS:
- food
- calories
- fuel
- energy
output:
energy