Bryophytes are known as non-vascular plants - what makes them non-vascular is the a<span>bsence of xylem and phloem.</span>
        
                    
             
        
        
        
Sickle Cell Anemia 
Hope this helps (:
        
                    
             
        
        
        
It’s because they’re curious or they get peer pressured into doing it to “fit in.”
        
                    
             
        
        
        
When an individual muscle fiber receives a threshold stimulus, it contracts as much as possible. ... a threshold stimulus is the minimum amount of energy needed to make a muscle fiber contract.