Ecosystems need producers because they are the start of the food chain. 
Producers are consumed by first consumers, the second consumers and so on.
 
        
             
        
        
        
The correct answer for this question is:
A farmer planted legumes and cabbage in the same field that is devoid of fertilizers. The yield from this field is better than the cabbage planted inanother field without legumes. The reason for this is because (A) <span>nitrogen-fixing present in the roots of legumes aid enrichment of nitrogen in the soil.</span>
        
                    
             
        
        
        
The thing about fiber evidence is that it disappears quickly so time  is limited on how long to work with the fiber  evidence
        
                    
             
        
        
        
Silent mutation and point mutation, the third C was turned into a G (point mutation) but this did not affect the amino acid it was supposed to code for (silent mutation)