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.

Question: What unit of measure is equal to the amount of work a horse can do in 1 minute? Answer: horsepower
Power may be measured in a unit called the horsepower. One horsepower is the amount of work a horse can do in 1 minute, which equals 745 watts of power.

Question: Enzymes - proteins which speed up what? Answer: chemical reactions
enzymes - proteins which speed up chemical reactions.

Question: What type of animal that eats only or mainly insects? Answer: heterotrophic
heterotrophic animal that eats only or mainly insects.