1. Matter (Nutrients):
* Organic molecules: Carbohydrates, proteins, lipids, and nucleic acids. These provide building blocks for growth, repair, and energy production.
* Inorganic molecules: Water, minerals, and gases (oxygen, carbon dioxide, nitrogen). These are essential for various biological processes.
2. Energy:
* Sunlight (for photoautotrophs): Used to convert light energy into chemical energy (e.g., plants).
* Chemical energy (for chemoautotrophs and heterotrophs): Obtained from consuming organic molecules (e.g., animals, fungi) or inorganic molecules (e.g., some bacteria).
3. Space:
* Physical space: A suitable environment for growth and survival, including adequate room for movement, resources, and shelter.
* Ecological niche: A specific role and position within the environment, which allows organisms to avoid competition with other species.
4. Conditions:
* Temperature: A suitable range for biological processes (varies greatly depending on the organism).
* Water: Necessary for most life processes.
* Light: Important for photosynthesis, visual perception, and circadian rhythms.
* Air: Provides oxygen for respiration and carbon dioxide for photosynthesis.
5. Interactions with other organisms:
* Predator-prey relationships: Provide food sources and control population sizes.
* Symbiosis: Mutualistic, commensalistic, or parasitic relationships that can benefit both organisms, one organism, or neither.
* Competition: Struggle for resources, space, and mates.
The specific requirements and acquisition methods vary greatly among different types of organisms. For example, plants acquire matter through photosynthesis, while animals acquire matter by consuming other organisms. However, all living organisms rely on the environment to provide the essential components needed for survival and reproduction.