Question

Humans cannot digest food without the aid of small single-celled organisms that live in our digestive tract. These small organisms help humans digest food by breaking down complex food molecules. Which common name is associated with these single-celled organisms that help humans digest food?A. algea B. bacteria C. virus D. protozoa

Answer 1

The correct option is B) bacteria

Step-by-step explanation:

Bacteria in our gut help to break down certain macromolecules into simple compounds. The bacteria of the large intestine break down complex carbohydrates. Bacteria such as the Lactobacillus breaks down lactose present usually in milk. Bifidobacteria is a bacteria present in the colon and it helps in the production of B vitamins. Hence, although bacteria are single-celled organisms that can be harmful but our microbiota comprises of millions of useful bacteria which help us to lead a healthy living.