Answer: The viral nucleic acid is most likely Deoxyribonucleic acid (DNA)
Explanation:
Unlike ribonucleic acid (RNA) where uracil can be found, thymine alongside adenine, cytosine and guanine are only found in DNA. 
Thus, the presence of 10% thymine in the newly discovered virus makes its analyzed nucleic acid to be deoxyribonucleic acid (DNA)
 
        
             
        
        
        
Answer: It depends on if your only talking about plants if so the answer is coal.
Explanation: The reason being because coal only forms from the compaction of dead plants whereas petroleum forms from compacted plants and animals.
 
        
             
        
        
        
Aphotic zone: It is an inky darkness that occupies the great bulk of the ocean.
Photic zone: its a surface layer that receives sunlight. 
        
             
        
        
        
Answer:
The nucleus at the central part of the cheek cell contains DNA. When a drop of methylene blue is introduced, the nucleus is stained, which makes it stand out and be clearly seen under the microscope.
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Answer:
http://etetoolkit.org/treeview/?treeid=e29a1e3f1e8914f370f5bb2415bbcf32&algid=ce443ed1e53858bf4e11d1e069c7a927
You can view the tree by clicking view tree...
Explanation:
I think that the Ctenophora are the first to diverge from the origin then Calcerea goes for second divergence and it goes straight in the order as provided by your data.
It also shows the organization of evolutionary pathway from simple (Ctenophorea and Calcerea) to complex like mammals (African Elephant)...