The ecological pyramid is smaller at the top due to the lower amount of species to fit into the category (diversity is decreased, and the higher, the more suppressed the energy is in the animals/species).
        
             
        
        
        
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
        
             
        
        
        
Fossilized non-seed vascular plants from the Devonian period have been identified. 
<span>The Devonian is an early period and conformity of the Paleozoic Epoch forming from the edge of the Silurian Era.</span>
        
             
        
        
        
Lamarckism also known as Lamarckian inheritance
        
             
        
        
        
Hippocrates taught that disease was the result of natural causes