Explanation: Survivorship curves fit three types. A Type I curve shows a low death rate in early and middle life but the death rate increases steeply in old age. A Type II curve shows a death rate is more constant throughout the lifetime of the species.
        
             
        
        
        
The mesosphere is the coldest layer of the atmosphere.
Hope that helped you.
        
             
        
        
        
When a mutation has an effect that helps a species adapt to an environment, and specimens of both genders have it, it will end up taking over, causing evolution to gradually happen.
        
             
        
        
        
Explanation:
i think they obtain food in order to get the energy they need to carry out life functions
 
        
             
        
        
        
Answer:
yes
Explanation:
The Sun generates energy from a process called nuclear fusion. half of the energy of the sun that's directed at Earth passes through