Ecology - the study of the interactions of living organisms with one another and with their environment, Biotic Factor - an environmental factor that is associated with or results from the activities of living organisms, Abiotic Factor - an environmental factor that is not associated with the activities of living organisms, Population - a group of organisms of the same species that live in a specific geographical area, Species - a group of organisms that are closely related and can mate to produce fertile offspring, communities - all of the populations of species that live in the same habitat and interact with each other, Biomes - a large region characterized by a specific type of climate and certain types of plant and animal communities, Biosphere - includes all life on Earth including all organic matter that has not yet decomposed, niche - the role of a species in its community, including use of its habitat and its relationships with other species, habitat - the place where an organism usually lives, producer - an organism that can make its own food by using energy from its surroundings, decomposer - an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrient, primary consumer - an organism that feeds on producers, secondary consumer - an organism that feeds on primary consumers, herbivore - an organism that only eats plants, conivore - an organism that only eats other animals, omnivore - an organism that eats both plants and animals, food web - a diagram that shows the feeding relationships between organisms in an ecosystem, food chain - the pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms, heterotroph - is an organism that eats other plants or animals for energy and nutrients, autotroph - is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals, predator - an organism that kills and eats all or part of another organism, prey - an organism that is killed and eaten by another organism,

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