instruction:
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:
Question: What kind of system do echinoderms possess? Answer: water-based circulatory
answer:
Echinoderms possess a water-based circulatory system.


question:
Question: Which observation demonstrates that light waves travel much faster than sound waves? Answer: An exploding firework is seen before it is heard.
answer:
An exploding firework is seen before it is heard observation demonstrates that light waves travel much faster than sound waves.


question:
Question: What proteins span the entire plasma membrane? Answer: transmembrane
answer:

Transmembrane proteins span the entire plasma membrane.