Answer:
Youuuhh seeeeee im jist answering for points oooof
Explanation:
At the bottom is the common phospholipid ,phosphatidylcholine.lipids are a group of naturally occurring molecules the include fats ,waxes ,sterols ,fat-soluble vitamins.
Starfish has a endoskeleton
a coral has a exoskeleton
sponge has neither
