Answer:
converts electrical energy to mechanical energy
Explanation:
 
        
             
        
        
        
The answer is; the melanin in darkly pigmented skin protects DNA from UV radiation, and UV radiation can cause skin cancer
In Africa, due to its equatorial latitude location, receives direct sunlight at more or less 90 degrees most of the year. These highly concentrated rays increase the UV radiation exposure  that can cause damage to cell DNA. Selection pressure, therefore, favored individuals with high melanin concentrations that protect against UV. Therefore population evolved towards high melanin densities in the skin. 
 
        
             
        
        
        
Answer:
Which two sense organs enable someone to run up a slope. Please state the explanation of each.
Sense organs that enables someone to run up a slope include eyes and nose
Explanation:
Eyes enables one to see where to run while nose ensure breathing is intact when making the run 
 
        
             
        
        
        
He proposed that over a large period of time natural selection could lead to change in order to better adapt a species to their changing environment
        
                    
             
        
        
        
The Latin names for individual species are written using a system termed "binomial nomenclature" that was developed originally by Linnaeus. Quite literally, each species is identified by a combination of "two names": its genus name and its specific epithet. A familiar example is that of human beings, Homo sapiens.