Answer:
Heterogeneous consists of the structure with various components or elements appearing to be irregular or variegated.
Explanation:
An example of this definition is a dermoid cyst in which has the components of a heterogeneous attenuation on CT.
 
        
             
        
        
        
help with what? there is nothing to answer
 
        
             
        
        
        
If there is limited of food then they will compete but if there is an equal amount of food they won’t compete. So the answer is true.
        
                    
             
        
        
        
Answer:
It is essential for all living things. Fixation: In order for organisms to use atmospheric nitrogen (N2), it must be “fixed” or converted into ammonia (NH3).
Explanation:
 
        
             
        
        
        
Answer:
Protection 
Explanation:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.