input with options: Q: What monitors the level of carbon dioxide in the blood? A:
OPTIONS:
- the lungs
- the heart
- the kidneys
- the brain stem
output: the brain stem

Q: Q: How is the radioactive decay measured? A:

OPTIONS:
- carbon dating
- quarter-life
- alpha emission
- half-life

A: half-life

input: OPTIONS:
- fins
- layers
- pores
- gills Now, answer this question: Q: Which part of a fish helps them breathe? A:
A:
output: gills

Q: The major component of a solution is called what? A:

OPTIONS:
- solute
- mixture
- water
- solvent

Answer: solvent

Problem: OPTIONS:
- heart
- skin
- kidney
- lungs
Q: Q: What is the organ in which gas exchanges take place between blood and air? A:
Answer: lungs

Q: Which procedure helps modern nuclear physics convert lead into gold? A:

OPTIONS:
- nuclear fission
- matter fusion
- evaporation
- nuclear bombardment

Answer:
nuclear bombardment