Answer:
That science was able to find more things and discover a lot more things than 300 million years ago.
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Answer: The correct answer is from areas of high concentration to low concentration. 
Explanation: Diffusion, by definition, is the process of molecules (any molecule) going down their concentration gradient (i.e. they are going from higher concentration to lower concentration). Hope that helped!
 
        
                    
             
        
        
        
Answer: Low levels of testosterone has been linked to joint pain and may cause rheumatoid arthritis in the long run. Rapid growth can lead to joint damage as <span>the accelerated bone growth disrupts the supply of blood to the cartilage, causing bone death and regrowth.
Hope this helps!</span>
        
                    
             
        
        
        
Anemia is the condition describing either a decrease in the number of red blood cells or the hemoglobin within the red blood cells
        
             
        
        
        
Answer:
The movement of glucose across the cell membrane through facilitated diffusion one of the form of passive transport because it does not require the energy to transport the glucose molecule across the cell membrane and the transport is along the concentration gradient.
In facilitated diffusion the passage of molecules if facilitated by a carrier protein or a channel protein. The rate of transport of molecules in facilitated diffusion is greater than simple diffusion.  
Through facilitated diffusion, some polar and charged molecules can cross the cell membrane without the expense of energy.