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 develops in depressions where water flow is low or nonexistent? Answer: bogs

A: Bogs develops in depressions where water flow is low or nonexistent.
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Q: Question: What preventive measure can protect even young children against diseases such as viral meningitis? Answer: vaccination

A: Vaccination can protect even young children against diseases such as viral meningitis.
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Q: Question: Mammalian sex determination is determined genetically by the presence of chromosomes identified by what letters? Answer: x and y

A:
Mammalian sex determination is determined genetically by the presence of chromosomes identified by the letters x and y.
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