In recent history, humans have influenced which parts of life on Earth? A. Almost none of it.
B. Life on land only.
C. Virtually all life on Earth.
D. Life in cities only.

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 best describes emerging scientific ideas

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus