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 ...

Discusses the temperate deciduous forest biome, highlighting its seasonal changes and the interdependence of plant and animal life. It explains the characteristics of the forest, including its layers ...

Under stressful conditions, the ctenophore Mnemiopsis leidyi can revert from a lobate adult stage to a cyddipid larva, depicted here. Animal life cycles typically follow a familiar pattern, declined ...