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.

[EX Q]: Question: Plant cells have structures that animal cells? Answer: lack
[EX A]: Plant cells have structures that animal cells lack.

[EX Q]: Question: Do particles collide more in two reactants when they are both in fluid forms or solid forms? Answer: fluid
[EX A]: Do particles collide more in two reactants fluid they are both in fluid forms or solid forms.

[EX Q]: Question: What is the measure of the force of gravity pulling down on an object called? Answer: weight
[EX A]:
Weight is the measure of the force of gravity pulling down on an object.