Answer:
I can't see the pictures are you sure you uploaded them please lmk
 
        
             
        
        
        
Complementary DNA (cDNA) is a DNA copy of a messenger RNA (mRNA) molecule produced by reverse transcriptase, a DNA polymerase that can use either DNA or RNA as a template.
        
             
        
        
        
Phylum. The classification system goes: Kingdom, Phylum, Class, Order, Family, Genus, Species. Anything that shares a class also share anything above it. 
        
                    
             
        
        
        
There are the answers for ur problems