Discussion
A tadpole develops into an adult frog by the process of :
Answer: B
A tadpole becomes a frog by metamorphosis.
Metamorphosis is a marked change of form during development after hatching. The aquatic tadpole, with gills and a tail, grows legs, develops lungs and absorbs its tail to become an adult frog, a process controlled by the thyroid hormone thyroxine.
Fertilisation is the fusion of egg and sperm, which happens before the tadpole exists. Budding is a form of asexual reproduction seen in yeast and Hydra. 'Embedding' is not a stage of frog development.
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