What triggers metamorphosis?

Answer 1

Metamorphosis is primarily triggered by hormonal changes in an organism, which can be influenced by environmental factors such as temperature, light, and food availability. In insects, for instance, the release of hormones like ecdysone initiates the transition from larval stages to pupae and eventually to adult forms. In amphibians, thyroid hormones play a crucial role in triggering the transformation from tadpoles to frogs. These hormonal signals coordinate the complex physiological and morphological changes necessary for metamorphosis.