Agood model of the cell membrane would be

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.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

Fredrick griffith made a scientific discovery in 1928