it separates the inside of the cell from the environment outside and it controls substances moving in and out of the cell (selectively permeable)
 
        
             
        
        
        
They produce pockets (eggs) for fertilization and they produce the reproductive hormones, oestrogen and progesterone.
        
             
        
        
        
Trace fossil because a trace fossil is a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
        
                    
             
        
        
        
Answer:
supplies nitrogen to the crop
Explanation:
they form a symbiotic relationship with bacteria also known as nitrogen fixation 
 
        
                    
             
        
        
        
Living because it consumes air and water