In a healthy person, the feces leaving the body contain very few undigested molecules from food. one major exception is cellulose, which leaves the body virtually intact. from this we can conclude that the human digestive system does not
answer
contain enzymes that can digest proteins such as cellulose.
digest cellulose because it does not contain any energy.
have a large intestine long enough to break down cellulose.
produce enzymes that can break down cellulose.

There is a major role in the digestive system. where as vegetables and protein food that provide nourishment that the digest cellulose do not have any energy.

Explanation:

where as food provide gives us energy but the produced enzymes that can break down cellulose. As having a large intestine long to break down cellulose.

sexual reproduction produces offspring with novel combinations of genes. species that reproduce sexually must maintain two different types of individuals, males and females, which can limit the ability to colonize new habitats as both sexes must be present.

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