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: Which gas is given off by plants? Answer: Oxygen

A: Oxygen gas is given off by plants.
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Q: Question: What type of molecules help the plasma membrane keep its shape? Answer: cholesterol

A: Cholesterol type of molecules help the plasma membrane keep its shape.
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Q: Question: What physical property of matter reflects how closely packed the particles of matter are? Answer: density

A:
Density of matter reflects how closely packed the particles of matter are.
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