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: Plant cells have structures that animal cells? Answer: lack
answer:
Plant cells have structures that animal cells lack.


question:
Question: What is the unit of evolution? Answer: population
answer:
Population is the unit of evolution.


question:
Question: What makes the earth habitable for humans? Answer: abundance of water
answer:

The abundance of water makes the earth habitable for humans.