Answer:
Genetic variation in a group of organisms enables some organisms to survive better than others in the environment in which they live. Organisms of even a small population can differ strikingly in terms of how well suited they are for life in a certain environment.
Explanation:
Genetic variations are important because a diverse gene pool is good for long-term survival of a species since the environment is always changing, so the diversity of DNA offers the most fit of the species a better chance of surviving because they are most adapted to the constantly changing environment.
 
        
             
        
        
        
Answer:
there is an increase of the average global temperature due to the accumulation of polluting gases in higher atmospheric levels that causes regional and global climate change.
Explanation:
 
        
                    
             
        
        
        
Answer:
Intelligent Design
Some scientists who are Christians have developed a theory called Intelligent Design to explain the creation and development of life on earth.
However, in my opinion its complete nonsense 
 
        
             
        
        
        
Answer:
The prokaryote divides by asexual mode of reproduction.
Explanation:
The concept of species which defines a species as a group of individuals of a population which can interbred and produce a fertile progeny is applicable to the organism which can reproduce sexually.
Since the bacteria divide through asexual means and not through sexual ways therefore the concept of defining a species becomes complicated and does not apply.However the concept of species in prokaryotes is still a topic of research.  
Thus, the biological concept of species is not applicable to prokaryotes.