Answers

2015-11-18T11:50:56+05:30
all living organism  on the earth  want to live and to survive .  here our heart beats all the time even when we are sleeping also our hormones , enzymes ,  excretory system , respiration , digestive system , etc works all the time 24 * 7  to keep alive and maintain  their life on the earth and to support their generation by performing and execution of life processes . 
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