Since the aphotic zone does not recieve sunlight it relys on the photic zone for the sunlight which in terms it does penetrate.
        
                    
             
        
        
        
I believe it's the body area examination, since a 'back' isn't and organ
Hope this helpss
        
             
        
        
        
Answer:
Codominant alleles or Incomplete dominance.
In codominance, the results are mixed, and both show. Incomplete dominance is when the results blend (red + white flower = pink flower)
 
        
                    
             
        
        
        
Prophase I
The chromosomes condense, and the nuclear envelope breaks down & crossing-over occurs.
Metaphase I
Pairs of homologous chromosomes move to the equator of the cell.
Anaphase I
Homologous chrmosomes move to the oppisite poles of the cell.
Telophase I and Cytokinesis
Chromosomes gather at the poles of the cells & the cytoplasm divides.
Prophase II
A new spidle forms around the chromosomes.
Metaphase II
Chromosomes line up at the equator.
Anaphase II
Centromeres divides & chromatids move to the opposite poles of the cells.
Telophase II and Cytokinesis 
A nuclear envelope forms around each set of chromosomes & the cytoplasm divides.
        
             
        
        
        
Answer:
Genes
Explanation:
Many of the traits of all living things are controlled by genes.
Genes is what make up who you are. Living things inherit this from the ancestors.