A gene pool is the set of all genes in any population that is of a certain species.
        
             
        
        
        
What do bacteria have surrounding their cell membrane?
cell wall
        
             
        
        
        
You have written the answer 7.5feets
        
             
        
        
        
Answer:
energy pyramid
Explanation:
An energy pyramid is a diagram that compares the energy used by producers, primary consumers, and other trophic levels. In other words, an energy pyramid shows how much energy is available at each trophic level. Energy is lost at each trophic level of a food chain.