Cell wall won’t be found in a animal cell since it’s only there in a plant cell.
        
                    
             
        
        
        
Answer:
Amphibians
Explanation:
They had just shown up during the Carboniferous period and were still living in the water.
 
        
                    
             
        
        
        
Nervous tissue is made up of neurons and supportive cells. Throughout the human body the neurons carry electrical and chemical signals, while nutrition is provided by the supportive cells. 
        
             
        
        
        
Catalyst. A catalyst is a substance that increases the rate of a reaction without being consumed the rate of a reaction without being consumed in process, or being chemically altered. There are many enzymes present in cells, proteases, lipases, that speed up metabolism, and catalysts .
 hOpe this has helped you any . >)
        
                    
             
        
        
        
It's c natural resources because they can never run out