Answer:
Those individuals survive which are the best ones and are adapted to their environment. Their survival is due to the possession Of adaptations. 
Explanation: 
Those organisms which are survive in the harsh environment, it is mainly due to some adaptations which helps them to survive in an environmental condition which are not suitable for them and those organisms are removed from the environment which have no adaptations capabilities. 
 
        
             
        
        
        
Answer:
some stuff you can just look up on goigle my dude
 
        
             
        
        
        
What graph!? If u want me to answer that u have to include a graph sooooo ya
        
             
        
        
        
Answer:
Explanation:
Polymer, Monomer
Polysaccharide, Monosaccharide
Polypeptide/Protein, Amino Acid
Nucleic Acid, Nucleotide
Lipid, Fatty Acid