Answer:
The correct option is A) will make no difference in the survival of life if there were major changes in the environment.
Explanation:
Due to genetic diversity, variations in species are caused which makes some organisms of a species to be better adapted than other members of the species. These variations cause organisms to survive when differences in the environment occur. Although the allele frequencies might change due to the changes in the environment but the phenomenon of genetic diversity allows life to sustain on earth even when conditions will become unfavourable.  
 
        
             
        
        
        
Answer:
Homologous features
Explanation:
If two or more species share a unique physical feature, such as a complex bone structure or a body plan, they may all have inherited this feature from a common ancestor. Physical features shared due to evolutionary history (a common ancestor) are said to be homologous.
 
        
                    
             
        
        
        
Your hypothesis is incorrect considering every day has the same length to it. 
        
                    
             
        
        
        
Many people hate shots and don't receive the vaccination, causing many illnesses spread around.<span />
        
                    
             
        
        
        
It was from nuclear fusion. (Sorry if it’s wrong but I’m pretty sure it’s not!)