Answer:
               Allopatric speciation occur due to various environmental factors with in the environment.
Explanation: 
                       Speciation occur when two population become so genetically different and the can not interbred to produce fertile off spring. The allopatric speciation occur when population become sepret and diverge over time due to natural selection,genetic drift,and mutation.Genetic drift is the sudden loss of gene from a population which cause the population evolvation. Mutation is also change in the genetic makeup of an individual.Natural selection is the phenomena selected by nature and natural forces are involve to select the trait in a living organism.
   
  
        
             
        
        
        
Answer: The natural world should be disturbed as little as possible in an experiment. 
Explanation: I just took the quiz 
 
        
             
        
        
        
An animals niche is its functional role in its ecosystem