I believe the correct response is A. The population of secondary consumers would decrease, as now these organisms can't obtain energy through the food they consume which is the primary consumers as there is none and thus the population in higher tropic level dependent on them would decrease. This is the secondary consumer.
        
                    
             
        
        
        
Answer:
crossing over
Explanation:
Crossing over is where homologs can exchange DNA which leads to genetic variation
 
        
             
        
        
        
Answer:
Fats and ATP are both energy molecules.
ATP is the source of energy which is directly used by each cell to carry out different functions. All cells use energy in the form of ATP. The mitochondria makes ATP by the process of cellular respiration whenever it is required by the body. ATP is not a stable molecule hence energy cannot be stored in this form.
 Fats are long term energy storage molecules. Fats are stable molecules hence they can be used for long term energy storage. 
 
        
             
        
        
        
its appendages are feathered
 
        
             
        
        
        
D - The organisms on the island are slightly different than those on the mainland.
The reason why this is the correct answer is because each successive generation on the mainland as well as the island both develop and continue adapting to their specific ecological niche and environment. They are, howerer, both still part of the same species.