input with options: Q: What units are typically used to measure heats of reaction? A:
OPTIONS:
- degrees Celsius
- volts
- kilobytes
- kilojoules
output: kilojoules

Q: Q: What can be thought of as the most biologically productive regions on earth? A:

OPTIONS:
- swamps
- forests
- coasts
- estuaries

A: estuaries

input: OPTIONS:
- complete reaction
- homeostasis
- single reaction
- an addition reaction Now, answer this question: Q: What is a reaction in which an atom or molecule is added to an unsaturated molecule, making a single product? A:
A:
output: an addition reaction

Q: The head of the sperm contains what, which holds the chromosomes? A:

OPTIONS:
- nerve cells
- fiber
- eggs
- nucleus

Answer: nucleus

Problem: OPTIONS:
- shape
- pressure
- color
- energy
Q: Q: Physical or chemical changes are generally accompanied by a transfer of what? A:
Answer: energy

Q: Respiration rate correlates with what? A:

OPTIONS:
- size
- heat
- pressure
- energy use

Answer:
energy use