Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[Q]: Question: Pressure and ________ are directly proportional at a constant volume? Answer: temperature
[A]: Pressure and temperature are directly proportional at a constant volume.

[Q]: Question: What long molecules are composed of chains of units called monomers? Answer: polymers
[A]: Polymers are long molecules composed of chains of units called monomers.

[Q]: Question: Roots grow in length and width from the primary and secondary what? Answer: meristem
[A]:
Roots grow in length and width from primary and secondary meristem.