Parenchyma cells synthesize and store organic products. 
        
             
        
        
        
The coral provides the algae with a protected safe environment (a home) and compounds they need for photosynthesis. The algae in return, produce oxygen and help the coral to remove wastes. Most importantly, zooxanthellae supply the coral with glucose, glycerol, and amino acids, which are the products of photosynthesis.
        
             
        
        
        
Answer:
Mitochondria: It is also called power house of the cell because it genetates or produces energy for the cell which is required for different functions. The glucose which is absorbed by the body is taken to the cell and from there the glucose is entered in the mitochondria. The mitochondria start break down of the glucose molecule and generates energy in the form of Adenine tri phosphate (ATP). 
 
        
             
        
        
        
Answer B is false. An element is a type of atom and you do not need to combine two atoms to get a specific element. Combining two atoms will leave you with a compound not an element.
        
             
        
        
        
A. arteries and veins.
Just as tubes within the stems and leaves of plants transport water, arteries and veins within animals transport blood with the required nutrients for our bodies.