Scientists have pinpointed the 'pace' and 'shape' of life as the two key elements in animal life cycles that affect how different species get by in the world. The findings have important implications ...

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 ...

The standing committee will organize a webinar to explore mental health issues that individuals face across the reproductive life cycle, including issues around sexual education, sexual coercion, and ...

Classical demographic theory was developed to describe age-classified populations, in which knowledge of an individual's age accurately specifies its demographic state. In many species (e.g., plants, ...

Butterflies (Papilionoidea) come in a remarkable variety of colors and patterns, from the orange majesty of the monarch to the lustrous red and blue of the peacock butterfly, but all butterflies ...

This is a preview. Log in through your library . Abstract (1) Observations on reproduction were made on two erpobdellid and five glossiphoniid species. The erpobdellids were: Erpobdella octoculata ...