If a scientist is experimenting with fifty of the same kind of organisms, how many should be controlled and how many should he use to test the variable?

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

gag reflex, poor dentition, gum retraction

have a good day