The farmer's action most likely have a negative impact on the ecosystem because may be there is no predator or controlling agent of that bird. 
<h3>Why introduction of new bird cause problem?</h3>
We know that one organism is responsible for controlling the population of other organism so if such type of controlling agent is present, the organism grow rapidly and can harm the whole ecosystem.
So we can conclude that farmer's action have a negative impact on the ecosystem due to presence of no predator or controlling agent of that bird. 
Learn more about bioagent here: brainly.com/question/842527
 
        
             
        
        
        
Nerve cells release neurotransmitters across gaps and secretion of proteins and wastes: it’s Exocytosis
        
             
        
        
        
The correct answer would be A. seal as paramecium, bacterium, and amoeba are all single-celled organisms. Thus, they cannot be an organism with tissues.
 
        
                    
             
        
        
        
Answer:
L-form bacteria are distinct from mycoplasmas, because Mycoplasma spp. do not originate from bacteria that normally possess a cell wall. ... Some of these bacteria remain as CWDB (stable L-forms), whereas others revert back to possession of a cell wall (unstable L-forms).
Explanation:
 
        
             
        
        
        
The rungs are composed of hydrogen bonded paired Nitrogenous Bases. These pairings are Adenine to Thymine and Guanine to Cytosine.