Each nephron has a tube that has a >><span>Semipermeable<<</span> membrane?
        
             
        
        
        
In my opinion 
Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes. One famous mass extinction event is the one that lead to the extinction of dinosaurs, 65 million years ago.
I hope it’s help
        
                    
             
        
        
        
A reverse reaction is the chemical reaction moving both forward and backwards. 
An example of this is Ammonium chloride  ⇌ ammonia + hydrogen chloride
This is a symbol for reverse reaction   ⇌
 
        
             
        
        
        
Answer:
Is this legit? Cause if so I yaaaaayyyyyyy!!!! thank sssssss