Answer: When you mix sand and water there are no reactions. The sand sits at the bottom of the water because the sand is heavier than the water is.
 
        
                    
             
        
        
        
Answer:
From The School of Biomedical Sciences Wiki. Complementary base pairing is the phenomenon where in DNA guanine always hydrogen bonds to cytosine and adenine always binds to thymine. The bond between guanine and cytosine shares three hydrogen bonds compared to the A-T bond which always shares two hydrogen bonds.
 
        
                    
             
        
        
        
Answer:
A. is palisade mesophyll
B. is spongy mesophyll
EXPLANATION OF PALISADE MESOPHYLL
- Palisade cells are found in the mesophyll of a leaf and their main function is the absorption of light so that photosynthesis can take place. 
- The palisade mesophyll consists of chloroplasts with chlorophyll that absorb the light energy
-  The mesophyll layer is made up of the palisade cell and spongy parts. #answerwithquality #BAL