Answer:
incoming Paleoindians, the first Americans, who allegedly hunted them to extinction.
 
        
             
        
        
        
Answer:
Because of their brightness, how big they are, and how many their are
Explanation:
 
        
             
        
        
        
There is a photo attached 
Hope this helps ^_^
 
        
             
        
        
        
Answer: Cell membrane 
Explanation:
The cell membrane has the ability to transfer the molecules from the exterior of the cell to the interior of the cell.
The cell membrane is semi permeable which means only selected molecules will pass through the cell membrane.
The molecules and substances that are synthesized inside the cell needs to be transported from inside to outside via cell membrane.
 
        
             
        
        
        
Structurally, DNA and RNA are nearly identical. However, there are three fundamental differences that account for the very different functions of the two molecules. RNA has a ribose sugar instead of deoxyribose sugar like DNA.