AP BIOLOGY

Detailed explanation-1: -Ingestion is the process of taking food into the body. Digestion is the process of breaking down food by mechanical and enzymatic action in the alimentary canal into substances that can be used by the body. Absorption is the process by which the digested food molecules are absorbed in the small intestine.

Detailed explanation-2: -The intake of food substances through the mouth is known as ingestion. It is the first step in the process of digestion.

Detailed explanation-3: -True. Ingestion: The process where food is taken in through the mouth and broken down by teeth and saliva. It is the first step in the process of nutrition.

Detailed explanation-4: -So, the correct answer is ‘Ingestion’.

Detailed explanation-5: -Ingestion can be referred to as an organism’s consumption of a substance. In the case of human beings, when the food is taken in from the mouth and then masticated and swallowed for further processing, it is called ingestion.