Reaching the Age of Adolescence — Science STD 8 — Question
Gujarat BoardEnglish MediumSTD 8ScienceReaching the Age of Adolescence2 Marks
Question
Thyroid gland has special significance/importance in a frog.
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Answer
$-$Metamorphosis in frog occur under the influence of a hormone.
$-$Transformation of a tadpole into a frog occurs by thyroxine hormone secreted from thyroid gland.
$-$If the water in which tadpoles are growing does not contain iodine, then production of thyroxine stops.
$-$In absence of thyroxine, tadpole does not transform into a frog.
$-$So, thyroid gland has special significance in a frog.
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