<span>The cell membrane is one of the great multi-taskers of biology. It provides structure for the cell, protects cytosolic contents from the environment, and allows cells to act as specialized units. A membrane is the cell’s interface with the rest of the world - it’s gatekeeper, if you will. This phospholipid bilayer determines what molecules can move into or out of the cell, and so is in large part responsible for maintaining the delicate homeostasis of each cell.</span>
Answer:
Sound waves are created by the sun traveling through color
music is someone singing and noise is like if you hear traffic and stuff
a ultrasound is something where you see if the baby is doing okay
Explanation:
Their are sound waves and they they reflect off the sun. Music is something you hear someone doing something with their vol col cords and they sing.