everything except for the carrots, trees and the ocean picture of algae is under heterotrophs
 
        
                    
             
        
        
        
Each macromolecule type has its own structure and function:
Nucleic acids are DNA and RNA. ...
Proteins, which contain polymers of amino acids, provide both functional and structural functions to cells. ...
Carbohydrates provide short-term energy storage to cells. ...
Lipids, or fatty acids, provide the long-term storage.
        
             
        
        
        
Answer:
a. Extension of the lower leg
Explanation: is correct
 
        
             
        
        
        
Answer:
18:repeat the experiment again
Explanation:
Because repeating the experiment would get rid of inaccurate data