Absence of true roots stems and leaves
        
                    
             
        
        
        
A lipid containing a phosphate group in it's molecule. 
        
             
        
        
        
Explanation:
A cell's lipid bilayer allows to small uncharged substances such as: ions, hydrophobic molecules, oxygen and carbone dioxide to travel through the membrane by simple diffusion
 
        
             
        
        
        
The guard cell is responsible for controlling the size of the stomata in leaves. These do so as a result of an interaction between potassium ions and water in and around the cells. When potassium ions accumulate inside the guard cells the water potential inside these cells is lower than that of the outside and as a result, water has to be taken in. This makes the guard cells turgid which in turn stretches them and results in the opening of the stomata. Meanwhile, when potassium ions accumulate outside the cell, the opposite scenario results. Water from inside the cell moves out, making the guard cells flaccid, thus causing these to cover (and effectively close) the stomata.  
 
        
             
        
        
        
They use the slat for traction on roads and its can also melt the ice and I don't think salt does anything to the plants on the sides along the road cuz the salt is on concrete