Answer:
The correct answer is 
A. Anxiety- Nervous system
Explanation:
Anxiety has nothing to do with the Nervous system; the nervous system is the nerves in your body and is not what makes you nervous or anxious. All the other answer choices are correct.
 
        
             
        
        
        
The condensed visible form of chromatin material is called as chromosome.
        
             
        
        
        
Answer:
Many different genes control the height of the plants
hope this helps! <3
 
        
             
        
        
        
Answer:D 
Explanation:
This isn’t B, because it’s only one species. It isn’t C, because it is one population, and A doesn’t make sense due to how they are of course organisms. D is your best bet.