Development: A classical experiment in endocrinology was the demonstration that tadpoles deprived of thyroid hormone failed to undergo metamorphosis into frogs.
(the demonstration; tadpoles deprived; of thyroid hormone) (the demonstration that tadpoles deprived of thyroid hormone; to undergo; metamorphosis)
the demonstration the demonstration that tadpoles deprived of thyroid hormone
tadpoles deprived to undergo
of thyroid hormone
metamorphosis