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Answer:
Summary. Multiple types of evidence support the theory of evolution: Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features).
Explanation:
Brainliest is appreciated, have a nice day :)
 
        
             
        
        
        
The variables are defined as the factors in an experiment, which are liable to change. The variable can be dependent or independent. The Independent variable is a variable, which is unaffected by the changes in the other variables. 
In this case, the brand of the food Shara feeds to the rats is independent factor, but it is changes in the system, so, it is an independent variable. 
The effect on the weight of the rat is dependent on the brand of food they are consuming. So, the weight of rats is dependent variable. 
 
        
                    
             
        
        
        
Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respirationoccurs in three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate.