First answer is , as the work of ventricle is to push blood to he whole body , so it has to be strong or it can not pump blood to head to the toe !
as in frog (an amphibian ) it has only three chambers as two artia and one ventricle, so the oxygenated blood from left artia and deoxygenated blood from right , combines and thus partial oxygenated blood is circulated !
        
             
        
        
        
3 kingdoms are there in the domain archea
 
        
                    
             
        
        
        
Answer:
 A hypertonic solution
Explanation:
There is a greater concentration of solutes outside of the cell than there is inside the cell, therefore it will rush out.
 
        
             
        
        
        
A muscle fiber will respond to a stimulus when that stimulus reaches the threshold level. These local classified potentials which are mainly related with external stimuli extent the axon preliminary segment and construct up to they manage to extent the threshold value. The bigger the stimulus the larger the depolarization or try to reach threshold.