Question

Now, imagine a cow who eats grass (which is mostly non- digestible cellulose) all day long. How does a cow get any energy out of that cellulose?

Answer 1

This makes a whole new energy source available to the cow. There's a lot of energy in cellulose, but most animals are simply unable to digest it because they don't have the necessary enzymes. That's where the microbes come in. Hope this helped! :)