In some amphibians, including salamanders, paedomorphosis results from mutations that ____.
A) reduce thyroid hormone production only
B) reduce pituitary hormone production only
C) limit the responsiveness of some developmental processes to thyroid hormone concentration only
D) reduce pituitary hormone production, limit the responsiveness of some developmental processes to pituitary hormone concentration, or both
E) reduce thyroid hormone production, limit the responsiveness of some developmental processes to thyroid hormone concentration, or both

Question

Quizplus · Accepted Answer

Paedomorphosis in amphibians, such as salamanders, can occur due to mutations that either reduce thyroid hormone production or limit the responsiveness of some developmental processes to thyroid hormone concentration, or both. This is because thyroid hormones play a crucial role in the metamorphosis of amphibians, and any alteration in their production or the body's response to them can lead to paedomorphosis, where juvenile traits are retained in the adult form.

In Some Amphibians, Including Salamanders, Paedomorphosis Results from Mutations That