allerySound-producing vocal sacs in frogs are present in
AJuveniles only before metamorphosis
BMales only (sexual dimorphism)
CFemales only (reproductive call)
DBoth sexes equally for warning
Answer & Solution
Correct answer: B. Males only (sexual dimorphism)
Vocal sacs are male-only structures in frogs (sexual dimorphism).
Males also have a copulatory pad on the first digit of forelimbs.
Females lack both structures.
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