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 happens when forces of evolution work over a long period of time? Answer: macroevolution
answer:
Macroevolution happens when forces of evolution work over a long period of time.


question:
Question: What phase is pure chlorine present as? Answer: gas
answer:
Gas phase is pure chlorine present as.


question:
Question: The lungs of mammals are unique in having what? Answer: alveoli
answer:

The lungs of mammals are unique in having alveoli.