Look on the internet please
        
                    
             
        
        
        
100,000 years ago is your answer
        
             
        
        
        
Hello there.
Question: <span>During the ________ stage, the placenta is expelled from the uterus.
Answer: It is the placental stage.
Hope This Helps You!
Good Luck Studying ^-^</span>
        
             
        
        
        
The instrument of choice would be the the clam shell sampler, which is also know as a grab sampler. Another instrument they use is the piston corer which is an open tube on a cable that gets dropped from a ship.