Answer:
Shows comparative homologous structures among different species.
Explanation:
The picture is showing the bones of forearms of different species. Structurally they appear the same but they serve a different purpose.
 
        
                    
             
        
        
        
Answer:
Microtubules are filamentous intracellular structures that are responsible for various kinds of movements in all eukaryotic cells. Microtubules are involved in nucleic and cell division, organization of intracellular structure, and intracellular transport, as well as ciliary and flagellar motility
Centrioles are cylindrical structures that are made up of protein tubes called microtubules. Specifically, nine groups of three microtubules, known as triplet microtubules, are linked together to make the walls of the cylinder.
Hope it helps :) 
 
        
                    
             
        
        
        
The majority of mutations have neither negative nor positive effects on the organism in which they occur.
        
                    
             
        
        
        
The answer is 
D) Pp, PP, and pp.
i attached a picture of a punnett square i did to help you understand the answer more, if you want.