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Metamorphosis in frogs occurs during the tadpole stage, where they develop limbs and lungs to transition into adult frogs.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Anatomy - Digestive and Respiratory System
Metamorphosis in frogs is primarily controlled by thyroid hormones, not general growth hormones.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Anatomy - Digestive and Respiratory System
Fertilization in frogs is external, occurring in water where the male fertilizes the eggs laid by the female.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Morphology and External Features
Frogs undergo external fertilization, where males release sperm over eggs laid by females in water.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Morphology and External Features
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