Question

Animals need bacteria to

Answer 1

Answer:

Bacteria took on a new role in animal nutrition, serving not only as prey but also as producers of digestible molecules in the animal gut. This role may have become more diverse with the evolution of a tubular gut, with one-way passage of food from mouth to anus.

Answer 2

Explanation:

Bacteria took on a new role in animal nutrition, serving not only as prey but also as producers of digestible molecules in the animal gut. This role may have become more diverse with the evolution of a tubular gut, with one-way passage of food from mouth to anus