What new insight did Robert Paine add to the existing theory on ecosystems and trophic pyramids

Identify the structures ! 20 points

What vitamin gives carrots and sweet potatoes their orange color?

Biology students used raw eggs in an experiment on tonicity and osmosis. the students put their eggs into vinegar to remove the shells. the vinegar was used to remove the shell from the raw egg. what other effect(s) did the vinegar have on the egg?