Answer:
  B) Under a microscope he observed box-like compartments of cork tree bark.
He observed a cork under a microscope.
Explanation:
He observed a cork under a microscope.
Hope that helps
 
        
                    
             
        
        
        
Answer:
Red and yellow. Incomplete is a blending of traits. 
Explanation:
 
        
             
        
        
        
It is C. Nitrogen. Nitrogen is 78% of the atmoshere
 
        
                    
             
        
        
        
Answer:
600 kcal
Explanation:
In an ecosystem, energy is transferred from one organism in a trophic level to another organism in another trophic level. Organisms called PRODUCERS are capable of deriving energy from the sun. However, when fed upon by PRIMARY CONSUMERS, only about 10% of the energy is transferred to them because most of the energy (90%) is lost as heat. 
Hence, in this case where the producers had 6,000 kcal of energy, 10% i.e. 10/100 of 6000 = 600 kcal of energy will be transferred to the primary consumers.