Answers

2016-02-24T20:07:55+05:30
IN FROGS METAMORPHOSIS IS BROUGHT BY THYROXINE HORMONE.THE PRODUCTION OF THYROXINE HORMONE REQUIRED THE PRESENCE  OF IODINE IN WATER.SO IF THE WATER IS DEFFICIENT IN IODINE,THE TADPOLES LIVING THERE CANNOT PRODUCE SUFFICIENT THYROXINE & CANNOT BECOME ADULT FROG.
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