If you know the input distance and output distance of a machine,
which quantity can you calculate?
work
actual mechanical
efficiency
ideal mechanical advanta

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.

Individuals do not compete directly for resources, but are prey for the same predator

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