Answer: The generally accepted parts of recent cell doctrine include: All known living things are made of one or more cells. All living cells arise from pre-existing cells by division. The cell is that the fundamental unit of structure and performance all told living organisms. I hope this helps :)
 
        
                    
             
        
        
        
Answer:
Sure grass.  And there is a lot of grass. Compete with wild horses, wild pigs, wild goats, wild "golfer's who are way off the fairway. Wild deer are in the forests, wild goats in the hills so buffalo and horses manage the plains and the back nine.  So much grass there was no competition...with the wild rabbits.  Grass continues to grow.  The buffalo move to greener pastures once they mowed down the other fields.  When there were Millions of them, they were not starving.
Explanation: Got this from somewhere hoping it helps!
 
        
                    
             
        
        
        
Answer:
plants, particularly in terrestrial ecosystems, and algae in aquatic ecosystems. If the plants or other producers of an ecosystem were removed, there would be no way for energy to enter the food web, and the ecological community would collapse.