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Which took longer to digest

Exercise and reference answers

Questions
  1. A
    Full boiled egg
    B
    Raw egg
    Higher value
    Full boiled egg
  2. A
    Boiled milk
    B
    Unboiled milk
    Higher value
    Unboiled milk
  3. A
    Raw egg
    B
    Boiled milk
    Higher value
    Boiled milk
  4. A
    Full boiled egg
    B
    Unboiled milk
    Higher value
    Full boiled egg
Instructions
Tap the food that took longer in the stomach.

Explanation

_Source: syllabus Environmental Studies, 'Looking Around', Ch 3 'From Tasting to Digesting'_
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