Answer:
when an organism is homozygous at the locus
Explanation:
 
        
             
        
        
        
I think it's either the Forest or grassland though it might be Forest, just saying
        
             
        
        
        
She would die because she would not have oxygen
        
             
        
        
        
Hi!
The answer is B. chloroplast because prokaryotic cells don't have contractile vacuoles, DNA, or a nucleus. 
Hope this helps!  :))<span />