Which of the following element should be available in water for metamorphosis of tadpoles ?टैडपोल के कायान्तरण हेतु पानी में निम्नलिखित में से कौन-सा तत्त्व उपलब्ध होना चाहिए ?
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Correct answer: C. Iodineआयोडीन
Explanation
Metamorphosis of a tadpole into a frog is controlled by thyroxine, a hormone that needs iodine to be made. Without iodine in the water, the tadpole does not turn into a frog.टैडपोल का मेंढक में कायान्तरण थायरॉक्सिन हार्मोन से नियंत्रित होता है, जिसके निर्माण के लिए आयोडीन आवश्यक है। पानी में आयोडीन न हो तो टैडपोल मेंढक नहीं बन पाता।More Environmental Studies (EVS) questions
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