In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[EX Q]: Question: What is at the top of the mesosphere? Answer: mesopause
[EX A]: The mesopause is at the top of the mesosphere.

[EX Q]: Question: Enzymes speed up the rate of a specific chemical reaction and is therefore known as what? Answer: biochemical catalysts
[EX A]: Enzymes speed up the rate of a specific chemical reaction and are therefore known as biochemical catalysts.

[EX Q]: Question: How do reptiles typically reproduce? Answer: sexually
[EX A]:
Reptiles typically reproduce sexually.