جاندار (Jandar) is a Persian term that refers to living organisms, including animals and plants. It encompasses all forms of life, from the smallest microorganisms to large mammals. The study of جاندار is essential in understanding ecosystems and biodiversity. In biology, جاندار is often contrasted with non-living things, highlighting the characteristics that define life, such as growth, reproduction, and response to stimuli. This concept is crucial for fields like ecology and conservation, which focus on preserving the balance of life on Earth and protecting species from extinction.