Answers

2015-07-23T16:19:11+05:30
WE HAVE FOUR CHAMBERED HEART BECAUSE WE CAN BE ALIVE IN 4 CHAMBERS, WE DO NOT NEED 10,20 OR 2
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2015-07-24T06:25:48+05:30
evolution tree shows everything clearly that change occurs in all living creature it does not depends upon it is animal or plants all living creatures are change their variations of livings to alive on earth on maintain their life on earth there are many animals having 2 chambered heart and 3 chambered heart means that depends on their need that who much their body wants energy and in feature if we are not able to transport blood then may be their evolution accelerate and make new procedure .so , that is clear that it is totaly depends upon evolution , shape , size , class, demands , etc.
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