1.

Thyroxine controls ____ in frogs and the development of ___ during embryonic development of other vertebrates. Thyroxine production requires the presence of ____ in diet.Select the correct sequence of words to complete the above passage.

A. Development, Circulatory system, Iodine
B. Metamorphosis, Circulatory system, Calcium
C. Development, Nervous system, Iron
D. Metamorphosis, Nervous system, Iodine
Answer» E.


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