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: What type of organisms do not need blood? Answer: single-celled
[A]: Single-celled type of organisms do not need blood.


[Q]: Question: What is the unit of evolution? Answer: population
[A]: Population is the unit of evolution.


[Q]: Question: One gram of carbohydrates provides how many calories of energy? Answer: four
[A]:
One gram of carbohydrates provides four calories of energy.