Answer: B
Explanation: Mars and Venus are terrestrial so a planet in between would be as well
 
        
             
        
        
        
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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The first in liquid i think
        
                    
             
        
        
        
It would be C. because the student is using different amounts of fertilizer in each container
        
                    
             
        
        
        
The horsehoe crab because it was one of the first animals to ever live on earth