Paleozoic comes from Greek word palaios which means "old" or "ancient", and zoe which means "life". it could be translated as "</span>Time of ancient life". The range of Paleozoic era is from <span>541 to 251 million years ago that could be divided into 6 smaller periods.</span>
The plasma membrane has a double layer of phospholipids with proteins dispersed throughout. These proteins help increase the durability of the membrane, as well as help with filtration.
