1)Without photosynthesis: If we didn't have plants, algae and bacteria  to do the photosynthesis, CO2, a air pollutant wouldn't be converted in to glucose for those organisms and there would be no more Oxygen released to the atmosphere. Less photosynthesis  means less oxygen production and many organisms, like us, would die.
2)Without cellular respiration: Without this process we couldn't convert our food into the energy, ATP, necessary for the cells to function properly. Plus, this process also forms water, and without it, it would be another reason for the death of the cells.
Ultimately, will cause the death of the aerobic organism.
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it can’t survive the vacuum of space, zero temperatures and radiation and the DNA may be the missing link to long distance space travel
        
             
        
        
        
Answer:
Combustion
Explanation:
Combustion is the chemical reaction that happens when fuel burns. 
 
        
             
        
        
        
Answer:
I think it is d
Hope this help and I'm sorry if I'm wrong.