The plants that were getting sunlight grew taller and bigger while the ones that didn’t were shorter and smaller. No matter if they got the same water.
        
             
        
        
        
<span>Yellow marrow fills the canals of long bones, and red marrow is found in the rounded ends of long bones (for example, the femur). Red marrow is made up of components of blood (red & white blood cells, platelets), while yellow marrow is primarily composed of fat cells.</span>
        
             
        
        
        
The regulation of the bodies internal environment is called homeostasis. And there are so many ways that affect homeostasis in the human body and to name three: first is the heat where we seat when we get too hot. Second, is the cold where we shiver when we get too cold and the third is the fluid intake where dehydration can kill.
        
             
        
        
        
I believe it's stem cells.
        
                    
             
        
        
        
D would be the answer to this question