The protein inside (a) red blood cells that carries oxygen to cells and carbon dioxide to the lungs is (b) hemoglobin. Hemoglobin is made up of four symmetrical subunits and four heme groups. Iron associated with the heme binds oxygen.
 
        
                    
             
        
        
        
I'm almost certain that the answer would be X and Y
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Answer:
A climograph combines a line graph of mean monthly temperature with a bar graph of total monthly precipitation
Explanation:
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Answer:
i pretty sure its c but i could be wrong
Explanation:
 
        
                    
             
        
        
        
<span>D. Vascular tissue
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Vascular tissue is responsible for transporting water and nutrients in plants. <span> The Vascular tissue consists of the Xylem and the Phloem. The main function of the Xylem is to transport water and minerals throughout all parts of the plant. Phloem on the other hand is responsible for transporting organic molecules that are larger in size. The vascular system, consisting on the Xylem and the Phloem runs from the roots of the plats through the branches and upto the leaves. It controls the total transportation of the water and nutrients.</span>