Question

Ancestral amphibians were tetrapoda that evolved during

• A. Carboniferous period
• B. Cretaceous period
• C. Jurassic period
• D. Devonian period

Answer 1

Answer: (D)

Devonian period

• The evolution of tetrapods began about 400 million years ago in the Devonian period.
  
• The earliest tetrapods are evolved from lobe-finned fishes.
• Tetrapoda, includes all living and extinct amphibians, reptiles, birds, and mammals.
• Hence ancestral amphibians were tetrapods that evolved during the Devonian period.
• So, the correct answer is 'Devonian period.