Answer:
Natural selection can result in organisms that are more likely to survive and reproduce and may eventually lead to speciation.
Explanation:
 
        
             
        
        
        
They are both involuntary
        
             
        
        
        
Answer:
nitrogen fixation, nitrification, denitrification, anammox, and ammonification
Explanation:
 
        
             
        
        
        
Pollution :) Since Abiotic means non living. 
Bacteria: Living
Food (worms or smaller fish): Living
Predators: Living
Pollution (dirt, trash, or other stuff): Non Living
 
        
                    
             
        
        
        
Answer:
C. because the common goal of basic science is to understand how things work, whether it is a cell, an organism, or a entire ecosystem.