Question

Give the composition of atphosphere and metion the importance of oxygen and water in it​

Answer 1

Dry air from Earth's atmosphere contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and traces of hydrogen, helium, and other "noble" gases (by volume), but generally a variable amount of water vapor is also present, on average about 1% at sea level.

Answer 2

The cell membrane (or plasma membrane) is composed mainly of phospholipids with embedded proteins. The membrane is a lipid bilayer, with the phospholipids oriented in a distinct manner to provide qualities necessary to maintain a cell in a water-based environment.