The statement 2+2=4 would be considered a LAW in the science world
        
             
        
        
        
Plant cells have what is perhaps the most complex outer coverings. Plant cell walls are made largely of cellulose which forms strong, highly rigid, almost indigestible coverings that protect the cell and gives it shape.
        
             
        
        
        
O+       1 in 3        <span>37.4%
</span>O-        1 in 15        <span>6.6%
</span>
O- can receive O-
O+ can receive O+, O-
O  can receive<span> O, A, B, AB</span>
 
        
        
        
The mass on mars is 38 percent of earth. Ex: dog weighs 100 on earth, and 38 on mars. 38 percent of 150 is 57 :P