What organ of the body is the first to receive the nutrients after they pass through the gi tract, and then prepares those nutrients for use in the body?.

The small intestine

Explanation:the small intestine absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use.

the organisms are not adapted to live in some communities or habitats.

helicase, i think thats it