<span>Plants use energy from sunlight to turn water and carbon dioxide into an energy-rich sugar called glucose. </span>
The main purpose is protection. The lipid bilayer protects the cell from viruses and other threats to the cell. It also maintains homeostasis within the cell by monitoring the amount of substances the enter or exit the cell.
The answer is cell. In the cell level of organization arachnoidiscus enhrenbergii and the stomach can be seen.
There would be less oxegen and also economically exploit us as 80% of things we use is from trees. we will be ruined, that's for sure.