Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Abhijeet Gaurav
No Sinoatrial (SA) Node or Sinus Node is the natural Pacemaker of heart. It's a mass of specialized cells in top of the right atrium(upper chamber of heart). It produces the electrical impulses that causes the heart to beat properly & thus forms regular rhythm.