instruction:
In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
question:
Sentence: Theevolution by natural selection theory explains how populations of organisms can change over time. Question: Which theory explains how populations of organisms can change over time?
answer:
evolution by natural selection


question:
Sentence: Ribosomes are the only organelles that prokaryotic cells have. Question: What are the only organelles that prokaryotic cells have?
answer:
ribosomes


question:
Sentence: Weight is the measure of the force of gravity pulling down on an object. Question: What is the measure of the force of gravity pulling down on an object called?
answer:

weight