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Changes in the appearance of boys at puberty are brought about by:
AThyroxine
BTryptophan
CThiamine
DTestosterone
Answer & Solution
Correct answer: D. Testosterone
1. The testes secrete a hormone as well as making sperms.
2. Testosterone regulates the formation of sperms.
3. It also brings about the changes in appearance seen in boys at puberty.
_Source: NCERT Class 10 Science, Ch 8 'How do Organisms Reproduce?'_
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