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← Nature & AnimalsWhich developmental risk increases when a larval amphibian's thyroid hormone receptor is constantly activated?
A)Impaired growth of adult tissues
B)Failure to initiate metamorphosis
C)Reduced resistance to bacterial infection
D)Premature transition to adult form✓
💡 Explanation
Premature metamorphosis occurs because Thyroid hormone receptor activation upregulates developmental genes through transcriptional regulation, accelerating tissue differentiation; therefore, early activation causes premature changes rather than halted development because that represents receptor deficit.
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