Is the cell wall or cell membrane composed of two layers of lipids and proteins?

Acell goes through cellular respiration and produces atp which it then uses to move a molecule across the cell membrane. how does the energy in the original glucose molecule change during this process? (2 points)

Ecology can best be described as the study of what

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%