Answer and Explanation:
It's a constrictive growth pyramid I think. They could die out in the future..
I can't remember the factors that have led to the growth
 
        
             
        
        
        
All things are made of cells (both algae and daisies are made of cells)
All cells come from pre-existing cells (both bacteria and horse cells had cells that made their cells)
Cells are the smallest unit of life (nothing is smaller than cells not grass cells or fungi cells)