Species - a group of organisms that are closely related and can mate to produce fertile offspring, Extinction - the death of every member of a species, Artificial Selection - the human practice of breeding animals or plants that have certain desired traits, Abiotic - an environmental factor that is not associated with the activities of living organisms, Biotechnology - the use and application of living things and biological processes, Matter - anything that has mass and takes up space, Molecule - a group of atoms that are held together by chemical forces; a molecule is the smallest unit of a compound that keeps all the properties of that compound, Energy - the ability to cause change, Producer - an organism that can make its own food by using energy from its surroundings, Consumer - an organism that eats other organisms or organic matter, Decomposer - an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients, Food Web - a diagram that shows the feeding relationships between organisms in an ecosystem, Energy Pyramid - a triangular diagram that shows an ecosystem's loss of energy, which results as energy passes through the ecosystem's food chain; each row in the pyramid represents a trophic (feeding) level in an ecosystem, and the area of a row represents the energy stored in that trophic level, Ecosystem - a community of organisms and their abiotic, or nonliving, environment, Biotic Factors - an environmental factor that is associated with or results from the activities of living organisms, Population - a group of organisms of the same species that live in a specific geographical area, Community - all of the populations of species that live in the same habitat and interact with each other, Predator - an organism that kills and eats all or part of another organism, Prey - an organism that is killed and eaten by another organism, Herbivores - an organism that eats only plants, Competition - ecological relationship in which two or more organisms depend on the same limited resource, Biodiversity - the number and variety of organisms in a given area during a specific period of time, Succession - the replacement of one type of community by another at a single location over a period of time, Ecosystem Service - a benefit that humans obtain from ecosystems, Habitat Destruction - the ruin or alteration of a place inhabited by an ecological community, Habitat Fragmentation - the breakup of a continuous area of habitat into several smaller, scattered, and isolated areas,

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