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.

Question: Which kind of muscle regulates air flow in lungs? Answer: smooth
Smooth muscle regulates air flow in lungs.

Question: Most protein antigens require signals from helper t cells (th2) to proceed to make what? Answer: antibody
Most protein antigens require signals from helper t cells (th2) to proceed to make antibody.

Question: Fish hatch into larvae that are different from the adult form of? Answer: species

Fish hatch into larvae that are different from the adult form of species.