ecosystem - The living organisms in a particular area, together with the non-living components of the environment., food chain - A sequence (usually shown as a diagram) of feeding relationships between organisms, showing which organisms eat what and the movement of energy through trophic levels., interdependence - Refers to the fact that all organisms that live in an ecosystem depend upon each other, for food, protection, shelter, etc, in order to survive., life processes - The key reactions that all living organisms complete., photosynthesis - A chemical process used by plants to make glucose and oxygen from carbon dioxide and water, using light energy. Oxygen is produced as a by-product of photosynthesis. Algae subsumed within plants and some bacteria are also photosynthetic., population - All of the members of a single species that live within a geographical area., predator - An animal that hunts, kills and eats other animals for food., prey - Organisms that predators kill for food., producer - Plants that begin food chains by making energy from carbon dioxide and water.,

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