because the world is spinning at a different angle and speed as it its orbiting the sun.
 
        
                    
             
        
        
        
Models are simplified representations of of different complex systems. They also help to study very small or large objects. 
Option B, D and E. 
Explanation:
Models are very simplified representations of complex systems and organs or structures which are prepared to study those systems by scientists and normal people easily. Many structures of human body like cells or some tissues are very small in structure or microscopic in nature. So studying them are very hard without specific instruments which are not always available. Thus models are made to easily study those structures by scientists and even normal people and students. 
 
        
             
        
        
        
Answer:
Emasculation is the removal of both the penis and the testicles, the external male sex organs. It differs from castration, which is the removal of the testicles only, although the terms are sometimes used interchangeably. 
Explanation:
:) :)
 
        
                    
             
        
        
        
 Answer:
Go to science.org and type your question up, they have plenty of diagrams and i used it to ace all of my bio quizzes.
Explanation:
Hope this helps! Have a great day!