Aseries of radiographic films taken of the esophagus, stomach, and duodenum after the patient swallows barium is called:

this is math not biology xd

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above