Because the temperatures vary on high global temperatures and its economy.
        
             
        
        
        
<em><u>Answer:</u></em>
They generate chemical energy in the form of ATP.
<u><em>Explanation:</em></u>
Mitochondria are the powerhouses of the cell because they "burn" or break the chemical bonds of glucose to release energy to do work in a cell. This releases energy (ATP) for the cell. The more active a cell (such as a muscle cell), the more mitochondria it will have.
 
        
             
        
        
        
Answer:The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.
Explanation:
  
        
             
        
        
        
The answer is true. You’re welcome
        
                    
             
        
        
        
Answer:
There are 2 alleles, a recessive allele and a dominant allele. The weaker allele is the recessive allele.