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.

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

What are the student's observations and inferences before he starts his investigation?

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous