Saturday 6th September 2025
    Difficulty: Very hard

    Saliva (#1,023)

    Photo by <a href="https://unsplash.com/@asaelamaury?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash">Asael Peña</a>
    Photo by Asael Peña (Unsplash)

    1. About how much saliva does an adult human produce per day?

    2. Saliva contains enzymes that start to break down food in the mouth. Which of these food groups is NOT broken down by salivary enzymes?

    3. What type of bird constructs its nest from its own saliva?

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