Seedless nonvascular plants include a. ferns and horsetails b. liverworts and ferns c. horsetails and mosses d. mosses and liverworts

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.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

How can you tell the difference between rough er from smooth er?