What is the function of a pacemaker in the heart?

If animal agriculture was eliminated, how much grain would become available for human consumption?

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.

What is the function of the nucleus in the euglena cells you observed?