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: Are vesicles larger or smaller than vacuoles? Answer: smaller
[EX A]: Are vesicles larger or smaller than vacuoles?

[EX Q]: Question: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only do what? Answer: contract
[EX A]: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only contract.

[EX Q]: Question: What spreads sti during sexual contact? Answer: pathogens
[EX A]:
Pathogens spread(s) stis during sexual contact.