Origin and Diversity of Amphibians

Amphibians evolved from lobe-finned fishes, adapting to land with legs and lungs. They first appeared 370 million years ago and now include over 6000 species across three orders: Anura, Eurodella, and Apoda. Anura includes frogs and toads, with differences in skin texture. Eurodella consists of salamanders and newts, characterized by elongated bodies and tails. Apoda are legless, tropical soil-dwelling amphibians. Amphibian populations are declining, raising environmental concerns.

What adaptations did amphibians develop to adapt to life on land?

What are the main differences between the orders Anura, Eurodella, and Apoda?

How do the skin characteristics of frogs and toads differ?

Describe the physical characteristics of organisms in the order Apoda.

What is the current status of amphibian populations globally?