Problem:OPTIONS:
- pyramid
- coil-shaped
- tubular
- hollow ball shaped

Q: What shape is the colony of a volvox cell? A:
****
A: hollow ball shaped

Problem:OPTIONS:
- protein
- energy
- glucose
- bacteria

Q: What is cholera? A:
****
A: bacteria

Problem:OPTIONS:
- sleeping
- digesting
- eating
- cooling down

Q: Lying with their mouths open, a behavior called gaping, probably serves what function for crocodiles? A:
****
A: cooling down

Problem:OPTIONS:
- rust
- spontaneous combustion
- steel oxide
- iron oxide

Q: When sparks from a steel grinder react with oxygen, what do they form? A:
****
A:
iron oxide