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.

[Q]: Question: The major entrance and exit for the respiratory system is which facial orifice? Answer: nose
[A]: The major entrance and exit for the respiratory system is nose facial orifice.

[Q]: Question: What is the process that allows organisms with better traits to survive and produce? Answer: natural selection
[A]: Natural selection is the process that allows organisms with better traits to survive and produce.

[Q]: Question: Why do multicellular organisms need transport systems? Answer: Most have cells that are not able to exchange gases with the outside environment.
[A]:
Most have cells that are not able to exchange gases with the outside environment do multicellular organisms need transport systems.