Answer: The systems regulate the house, the same way our body system helps regulate our body. If it wasn’t for the electrical system, plumbing system, heating, and cooling system the house wouldn’t be regulated or able to live in. Just like if our bodies isn’t being regulated, we can't live. 
I hope this could help you! ^^
        
             
        
        
        
Answer:
If he inherited a mutation which made him more susceptible to lung cancer, it may have been present in some of the gametes he produced and passed to his children
Explanation:
Even tho the cause of lung cancer is not very clear, a genetic predisposition is of a great influence, his smoking and therefore causing a lung cancer is not appliable to his children because of no connection, but in the sense of having a mutation which makes you predisposable to the cancer with or without the smoking, can lead to a high risk of gene inheritance and therefore inheriting the mutation with a high risk of getting lung cancer excluding the smoking.
 
        
                    
             
        
        
        
Is caused by vibration, can travel through a vacum, and travels in longitudinal waves<span />
        
                    
             
        
        
        
True, all leaves at them stem calling the process "Nodes"
        
             
        
        
        
Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years (for the most massive) to trillions of years (for the less massive), considerably more than the age of the universe. ^ 
Small, relatively cold, low mass red dwarfs burn hydrogen slowly and will burn for hundreds of billions of years 
Massive hot supergiants will live for just a few million years. 
A mid-sized star like the Sun will remain on the main sequence for about 10 billion years. Hope tis helps!!