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Barn Owl Glossary
| Question | Answer |
|---|---|
| Anterior | toward the front or head region of an organism (opposite of posterior) |
| Autotroph | an organism capable of extracting energy and raw materials from the environment and making its own food |
| Biological indicator | a species of animal or plant used to evaluate the health of an ecosystem due to their unique role |
| Biomass | total weight or calorie (energy) value of a living organism |
| Bios | living, life |
| Biosphere | the thin ring of atmosphere, water, and soil at the surface of the earth where organisms live |
| Carnivore | animal which satisfies its energy needs by feeding on animal flesh |
| Casting | a matted ball of undigested fur, feathers, and bone regurgitated by all birds of prey |
| Chitin | the main component of an insects' or crustaceans' exoskeleton |
| Clutch | the eggs and chicks produced in one breeding effort |
| Dental forumla | one side of the jaw; first number is incisors; second number is canines; third is pre-molars; fourth is molars |
| Dorsal | toward the back (opposite of ventral) |
| Ecology | the study of interactions of organisms with their environment and with each other |
| Energy | the power to do work; may be lost in the form of heat |
| Food Chain | an orderly sequence of organisms which indicates the flow of energy and raw materials in the ecosystem |
| Food Web | interlocking food chains in a community |
| Forage | search for food |
| Gizzard | muscular organ of a bird's digestive system that prepares food for the stomach; site of pellet formation |
| Habitat | the place where an organism lives |
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