Answer:
A
Explanation:
The reason the deletion of a nucleotide can be a lethal mutation is that it causes a frameshift mutation. This is due to teh fact that the codon sequence on the DNA is shifted by a single nucleotide. Therefore, the codons will read differently downstream from the place the deletion happened. The amino acids coded for by these codons will change too. The translated proteins will be defective and the organisms will be adversely affected, phenotypically. 
 
        
             
        
        
        
Biodiversity tends to clump around the equator, as it has more heat. The closer you are to the equator, the more biodiversity you will find. The polar regions have little to no life.
        
                    
             
        
        
        
Answer:
The Retina
Explanation:
The photoreceptors lie at the back of the retina
 
        
             
        
        
        
Answer:
community is a rural area where more than two specie's living together
Explanation:
while population is the total number of specie's 
from the above answers you can see how community and population are different