A person should know the effect of auxins as it helps in growth of the stems and the person should know how much he should cut otherwise will keep cutting it non uniformly affecting the plant growth and exposure to sunlight.
        
                    
             
        
        
        
In small intestine millions of micro villi are present for greater absorbption of digested food.
        
             
        
        
        
D JURASSIC PERIOD BECAUSE THEY CAME UP WHEN DINOSAURS CAME
        
                    
             
        
        
        
Answer:
hydrogen bond
Explanation:
The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak.