Answer:
In mammals, oxygen is carried through the red blood cells called hemoglobin. The reason is that the oxygen is very important for the cell for releasing energy. This energy is used by the cell in different processes. 
2) These adaptations are adapted by the organisms in order to perform different functions. In slow twitch skeletal muscles having high number of mitochondria because it requires more energy while fast twitch skeletal muscles contains less amount of mitochondria due to low requirements of energy. These characteristics are adapted according to the performance of the body parts. 
 
        
             
        
        
        
Answer:
I'm pretty sure the answers for this is D, C, and B.
 
        
             
        
        
        
<u>Answer:</u>
sensory system
The eye belongs to an organ system called the sensory system. This system includes all the sensory organs of the body, including the ears, eyes,...
<u>Explanation:</u>
*can i be the brainliest*
 
        
                    
             
        
        
        
Answer:
Reactants: Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
Products: Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
Explanation:
I hope this helped you ;)