An advantage to reproducing sexually, is the genetic variation the offspring will obtain. 
        
             
        
        
        
Physical is something you can have/ hold and mental is something in ur head that you can't see or hold.
        
             
        
        
        
The inner planets are made of rocks while the outer planets are composed of gas.
The inner planets are closer to Sun and are small in size while the outer planets are far away from sun and are larger in size
        
             
        
        
        
 The phenomenon is called an equinox. More specifically when it is September it is called the autumnal equinox ,and when it is March it is called the vernal equinox.  Hope this helped!
 
        
             
        
        
        
The right answer is The cells are damaged.
Take the example of skin cells.  
The skin consists of two tissues:
* the outermost, the epidermis, resting on a vascularized connective tissue,
* the dermis.
In the epidermis, which includes several layers of cells, the outer layer is formed of dead cells that are desquamating and are constantly being replaced from proliferating basal cell cells. So, in normal conditions, the epidermis is in constant renewal.
On the other hand, when accidentally, the upper parts of the epidermis are damaged, for example, a slight abrasion or of a burn, the destroyed portion is regenerated (replaced) thanks to an accelerated proliferation of basal epidermal cells .