Osmosis is the diffusion of water across a semi-permeable (or differentially permeable or selectively permeable) membrane. The cell membrane, along with such things as dialysis tubing and cellulose acetate sausage casing, is such a membrane. The presence of a solute decreases the water potential of a substance.
        
                    
             
        
        
        
the human body is always at work and using all organs the bodys largest organ is the skin 
 
        
             
        
        
        
Fertilization, mitosis, meiosis, birth
        
             
        
        
        
Red and yellow bell pepper plant can reproduce with each other - Genetic diversity.
A park has 80 species of trees - species diversity.
There are many breeds of dogs - genetic diversity.
Five different bird species are at a bird feeder - species diversity.