Answer:
peptide bond OR dehyrdration synthesis (this is mainly for bonding monomers to polymers..so its peptide bond)
Explanation:
 
        
                    
             
        
        
        
The organisms who do better at surviving and reproducing will pass on more genes than those who don't.  So those with better adaptations will survive more to pass on those genes.
        
             
        
        
        
After reading the above information, one reason different members of  crow populations have a different rate of survival is there is always a chance that that some other variation will also effect some of the crows ability to survive. Another reason is  that the vision, muscle strength and size can influence survival. 
        
             
        
        
        
<span>During photosynthesis, plants use carbon dioxide and produce oxygen. During metabolism oxygen is used and carbon dioxide is a product. Humans impact the carbon cycle during the combustion of any type of fossil fuel, which may include oil, coal, or natural gas.</span>