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 proteins recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms? Answer: antibodies

A: Antibodies recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms.
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Q: Question: What is the term for the affected factor in an experiment? Answer: dependent variable

A: Dependent variable is the term for the affected factor in an experiment.
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Q: Question: What organ participates in all digestive activities except ingestion and defecation? Answer: stomach

A:
Stomach organ participates in all digestive activities except ingestion and defecation.
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