Answer the following question given this paragraph: Some reactions need extra help to occur quickly. They need another substance called a catalyst. A catalyst is a substance that increases the rate of a chemical reaction. A catalyst isn't a reactant, so it isn't changed or used up in the reaction. Therefore, it can catalyze many other reactions. Q: Some reactions need extra help to occur quickly. they need another substance called what? A:

OPTIONS:
- neurotransmitter
- protein
- hormone
- a catalyst

Answer: a catalyst

Problem: OPTIONS:
- large nervous system
- autonomic nerous system
- somatic nervous system
- central nervous system
Q: Answer the following question given this paragraph: The peripheral nervous system consists of all the nerves that are found outside the central nervous system. Q: The peripheral nervous system consists of all the nerves that are found outside what? A:
Answer: central nervous system

Problem:OPTIONS:
- medium
- too high
- low
- very high

Answer the following question given this paragraph: Q: Do tropical regions have very high or very low rates of immigration? A:
****
A: very high

Answer the following question given this paragraph: Vertebrates have a system of muscles attached to the endoskeleton to enable movement. Muscles control movement by alternately contracting (shortening) and relaxing (lengthening). Generally, muscles work together in opposing pairs. Q: In vertebrates, a system of what structures attached to the endoskeleton enables movement? A:
OPTIONS:
- nerves
- tendons
- tissues
- muscles
muscles

Answer the following question given this paragraph: numbers have the same value on both sides, the mass number of the daughter isotope must be 12, and its atomic number must be 6. The element having an atomic number of 6 is carbon. Thus the complete nuclear equation is as follows:. Q: What element has an atomic number of 6? A:
OPTIONS:
- silicon
- oxygen
- hydrogen
- carbon

Answer: carbon

input with options: Answer the following question given this paragraph: Q: Terrestrial arthropods generally have internal surfaces specialized for what? A:
OPTIONS:
- water uptake
- food gathering
- protection
- gas exchange
output:
gas exchange