Hello! Succession is not really harmful to ecosystems and it’s not a one-time event, because things come and go overtime. Therefore, it’s not A or D. It is necessary for ecosystem recovery, because it’s needed to continue on with things, just like families reproduce to make family continue. It’s not that bad. It’s just a natural process that happens. The answer is B: natural recovery process.
        
                    
             
        
        
        
Answer:Sugars and amino acids are made of the same elements but amino acids also contain nitrogen.
Explanation: its C
 
        
             
        
        
        
Answer:
An air mass that originates over land in Central America is most likely warm & dry.
Explanation:
 
        
                    
             
        
        
        
A chloroplast are used for the process of photosynthesis which makes food 
 
        
             
        
        
        
Homozygous means "the same" and Heterozygous means "different". If a pheno type is homozygous, for example, it could be XX or xx, while heterozygous could be Xx. Hope that helps.