livssyklusens

Livssyklusens, in Scandinavian languages, refers to the life cycle—the series of stages through which an organism or system passes from origin to end. The term is used across biology, ecology, and environmental science to study timing, duration, and transitions.

In biology, life cycles describe the progression from birth or germination, through growth and development, to reproduction and death. Some species have direct development; others undergo metamorphosis, with larval forms distinct from adults. Plants often exhibit alternation of generations, with sporophyte and gametophyte stages.

At the cellular level, life cycles include the cell cycle, with interphase, mitosis or meiosis, and cytokinesis, governing growth and reproduction. In populations, life cycles influence ecological interactions, timing of reproduction, and generation turnover, affecting models of population dynamics.

In environmental science and engineering, life cycle assessment (LCA) analyzes the environmental impacts of a product or service across its life cycle, from raw material extraction to disposal.

The term is used variably in different languages and disciplines, but the core idea remains: life occurs in stages linked by development, reproduction, and decline, framed by genetics, physiology, and environment.