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On Friday, when we initially started talking about us as macromolecules eating macromolecules. It almost sounded like the same reasoning a vegetarian may have for not eating animals and/or animal products. In sense we are eating the same building blocks of life in everything that we eat, whether they are plants or animals. We may break them down into smaller molecules to produce the energy necessary to survive.

Now the waterwheel example, I'm still a little confuse about it. I don't think I understand the connection between the waterwheel and the breakdown diagram of the macromolecules.