I'm pretty sure the answer would be A. Chromosomes contain one or more genes.
        
                    
             
        
        
        
Answer:
Nephrons in birds, mammals, and reptiles are all extremely similar, more so than other structures in the bodies of different species, solidifying the relatedness through similarity.
Explanation:
Birds can be said to have "mammal-like" nephrons from the number of loops and overall structure of their kidneys, which, although they look very different, serve the same purpose and do it in largely the same way. Reptiles also have mammal-like nephrons, and it can be assumed that this evolutionary trait was kept because the specific structure of the nephrons is generally the most efficient.
 
        
             
        
        
        
Polymerization would be the answer you're looking for.
        
                    
             
        
        
        
Answer:
this is rose plant . it's easy . what doubt you have in this question? 
Explanation:
the rose is pink in color. it has green leaves with spikes. generally people give red roses on 14 feb because that day was valentine's day.