There are two basic life-cycle patterns among animals. Many animals have complex life cycles with two or more very distinct stages; metamorphosis is the usual term for the often-radical changes that ...

Introduction -- The amphibian fauna -- The amphibian life cycle -- Order caudata: Salamanders and relatives -- Order anura: Frogs and toads siris_sil_1071723 ...

CORVALLIS, Ore. – Even though they had the ability to evolve and survive for hundreds of millions of years - since before the time of the dinosaurs and through many climatic regimes - the massive, ...