What is the role of restriction enzymes in studying the human genome?

What is the importantence of the carbon and nitretan cycles in the environment

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle