Classify the following relationship as parasitism, commensalism, mutualism: a spiny sea urchin and a tiny fish that hides from predators by floating among the sea urchin's spines?

Building glycogen from glucose molecules is an example of what

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.

Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.