elinkaarimuotoihin

Elinkaarimuotoihin, also known as life stages or developmental stages, refers to the distinct phases an organism progresses through from its beginning to its end. These stages are characterized by specific biological, physiological, and behavioral changes. For most multicellular organisms, the life cycle typically begins with fertilization, leading to an embryonic or larval phase. This is followed by a juvenile or growth phase where the organism matures. Subsequently, the organism enters a reproductive phase, where it is capable of procreation. Finally, it undergoes senescence, a period of decline, ultimately leading to death.

The specific names and duration of these life stages vary greatly across different species and even within the same species due to environmental factors. For example, in insects, metamorphosis involves distinct larval, pupal, and adult stages, while mammals generally follow a more continuous progression from infant to adult. Understanding life stages is crucial in fields such as biology, ecology, and developmental psychology, as it helps in studying population dynamics, species survival, and the aging process. Different stages often have different ecological roles and vulnerabilities.