Amphibia undergo what during development?

Amphibia undergo what during development?

• A. Metamorphosis
• B. Direct development
• C. Parthenogenesis
• D. Binary fission

Answer: (A)

Amphibia undergo metamorphosis during development: they typically start life as an aquatic larva, like a tadpole with gills and a tail, and transform into the adult form with legs, a different body plan, and often lungs. This dramatic reorganization of tissues and organs is mainly driven by thyroid hormones and is a hallmark of many amphibian life cycles. While some species can bypass this path through direct development or show neoteny, the classic pattern emphasizes a larval stage that becomes the mature form. The other options describe reproductive or cellular processes not characteristic of amphibian development.

Amphibia undergo metamorphosis during development: they typically start life as an aquatic larva, like a tadpole with gills and a tail, and transform into the adult form with legs, a different body plan, and often lungs. This dramatic reorganization of tissues and organs is mainly driven by thyroid hormones and is a hallmark of many amphibian life cycles. While some species can bypass this path through direct development or show neoteny, the classic pattern emphasizes a larval stage that becomes the mature form. The other options describe reproductive or cellular processes not characteristic of amphibian development.