The answer i think it changes
        
             
        
        
        
Answer:
Tree planting is the safest solution to pollution. Save the earth, save our environment. Don't be cruel, conserve your fuel.
 
        
                    
             
        
        
        
DNA and RNA both contain a cyclic nitrogenous base, a posphate group and a five-carbon sugar.  These are the base units of nucleotides which make up nucleic acids.  DNA contains the nitrogenous bases; adenine, thymine, cytosine and guanine wheresas RNA contains the bases; adenine, thymine, cytosine and urasil.  DNA codes for the nucleotides in an RNA molecule, whereas DNA codes for the amino acid sequence in a protein 
        
             
        
        
        
Positive feedback is a control system that sends a signal to ( increase) a response.
        
             
        
        
        
False, Animal cells do “not” have cell walls.