1. The central nervous system including brain and spinal cord.
2. The peripheral nervous system including nerves coming out from the brain and spinal cord, i.e., cranial nerves and spinal nerves.
3. The autonomic nervous system including sympathetic nervous system and parasympathetic nervous system.
 
 
        
                    
             
        
        
        
The first, second, and fourth statements are correct.
        
             
        
        
        
Answer:
The four nitrogen bases that are found in deoxyribonucleic acid (DNA) are adenine, cytosine, guanine, and thymine.
Thymine and cytosine comprise of one -carbon nitrogen ring and also called pyrimidines, while two carbon nitrogen ring is present in adenine and guanine and also called purines. Purines has larger in size because of extra carbon nitrogen ring. 
 
        
             
        
        
        
Answer:
The genotype of each parent plant is 1:2:1
Explanation:
 I don't say you have to mark my ans as brainliest but my friend don't forget to thank me if it has really helped you....