The correct answer is d: cDNA.   
<span>cDNA or complementary DNA is DNA synthesized usually from messenger RNA (mRNA) by the enzyme reverse transcriptase. Because this molecule is from mRNA it contains only exons. cDNA is also produced naturally by retroviruses, for example, HIV virus.</span>
        
             
        
        
        
Answer:
Ok I am pretty sure 
Top left is Prophase 1
Bottom left is Anaphase 1
Top right is Metaphase 2
Middle right is Telophase 2
Bottom right is Prophase 2
Explanation:
I hope this helped
 
        
                    
             
        
        
        
Tumor cells are cells that divide relentlessly, forming solid tumors or flooding the blood with abnormal cells.
        
             
        
        
        
Melting ice caps and glaciers
        
             
        
        
        
Birds and animals and maybe the bony fish.