[Campbell Biology P.1064] The "Evolution of Hormone Function" section highlights how hormone ... | Practice Question

The "Evolution of Hormone Function" section highlights how hormone functions can diverge across species. Which statement correctly describes a specialized function of thyroxine mentioned for frogs?

  • A: It primarily regulates the daily activity level in adult frogs.
  • B: It stimulates the resorption of the tadpole's tail during metamorphosis.
  • C: It plays a primary role in regulating metabolism across all evolutionary lineages, including frogs.
  • D: It regulates the formation of internal reproductive structures during frog embryonic development.

Explanation

The text explicitly states: 'In frogs, however, the thyroid hormone thyroxine T4 has taken on an apparently unique function: stimulating resorption of the tadpole's tail during metamorphosis Figure 45.22 '. This is highlighted as a specialized function that diverges from its general metabolic role.