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Ecology
| Autotroph | Is an organism that produces its own food. |
| Heterotroph | Is an organism that can't make it's own food. |
| Organism | Is any individual living entity. |
| Habitat | Is the natural environment. |
| Biotic factor | Is the living components of an ecosystem. |
| Abiotic factor | Is the non-living. |
| Species | Is a group of organisms. |
| Population | Is a group of individuals |
| Community | Is an interacting group of various species. |
| Ecosystem | Is a functional unit of nature. |
| Ecology | Studies how organisms interact with each other. |
| Immigration | Is the movement of individual organisms. |
| Emigration | Is the act of individuals or organisms leaving. |
| Population density | Is the average number of individuals of a species. |
| Limiting factor | Is any living or non-living environmental variable. |
| Carrying capacity | Is the maximum number of individuals. |
| Natural selection | Is the fundamental mechanism of evolution. |
| Adaptation | Is the process where populations become better suited. |
| Niche | Is the functional role. |
| Competition | Is an interaction between organisms. |
| Predation | Is a biological interaction where one organism. |
| Mutualism | Is a type of symbiotic, interspecies interaction. |
| Commensalism | Is a type of symbiotic relationship in biology. |
| Parasitism | Is a non-mutual symbiotic relationship between species. |
| Parasite | Is an organism that lives on or inside another organism. |
| Host | Is an organism that harbors another organism. |
| Succession | Is the gradual directional process of change in the species. |
| Primary succession | Is the process of ecological development. |
| Pioneer species | Is the first hardy organisms. |
| Secondary succession | Is the process of ecological community. |
| Producer | Are organisms that create their own food. |
| Consumer | Is an organism that gets energy by feeding on other organisms. |
| Herbivore | An organism that eats plants. |
| Carnivore | An organism that eats meet |
| Omnivore | A organism that eats both plats and meet. |
| Scavenger | An organism that consumes dead biomass. |
| Decomposer | An organism that breaks down dead things. |
| Food chain | It illustrates how nutrients and energy is transferred. |
| Food web | Are interconnected network of multiple food chains. |
| Energy pyramid | Is a graphical model representing the flow of energy. |
| Nitrogen fixation | When something is converted into ammonia. |
| Biome | Is a large, distinct geographical region. |
| Climate | The long term predictable pattern of atmospheric conditions. |
| Desert | Is a terrestrial biome defined by extreme aridity. |
| Rain forest | Is a dense, high-precipitation, and typically evergreen. |
| Emergent layer | Is the topmost layer of a rain forest. |
| Canopy | Is the uppermost layer of a plant community. |
| Understory | Is the layer of vegetation in a forest. |
| Grassland | An area where the vegetation is dominated by grasses. |
| Savanna | Is a mixed woodland-grassland ecosystem. |
| Deciduous tree | A woody plant that seasonally sheds all its leaves |
| Boreal forest | Are forests growing in high-latitude environments. |
| Coniferous tree | Is a major group of gymnosperm trees. |
| Tundra | Is a cold, biome with extremely low temperatures. |
| Permafrost | Is when something remains frozen all year. |
| Estuary | a partially enclosed coastal body of brackish water |
| Intertidal zone | The dynamic, high-stress coastal area. |
| Neritic zone | Is the shallow, nutrient-rich part of the ocean. |
| Biogeograpy | Is the study of the spatial distribution. |
| Continental drift | It explains the distribution of fossils. |
| Dispersal | Is the movement of individuals. |
| Exotic species | They are special organisms. |
| Point source | Is a single, identifiable, and confined location. |
| Nonpoint source | Is contamination that does not originate from a single. |
| Biodegradable | Are materials capable of being broken down. |
| Natural resource | Is the fundamental mechanism of evolution. |
| Soil conservation | Is the management, protection, and preservation of soil. |
| Crop rotation | The agricultural and biological practice. |
| Contour plowing | Is an agricultural practice of plowing and planting. |
| Conservation plowing | Is an agricultural practice designed to reduce soil. |
| Biodiversity | Is the variety and variability of all living organisms on Earth. |
| Keystone species | An organism that has a disproportionately large effect. |
| Endangered species | Is a population of organisms that might die out. |
| Threatened species | Is any plant or animal species that could go extinct. |
| Extinction | Is the complete disappearance of a species. |
| Habitat destruction | Is the process by which natural ecosystems are altered. |
| Habitat fragmentation | Is the process where large, continuous ecosystems are broken. |
| Poaching | Is illegal hunting. |
| Captive breading | Is to increase population numbers. |
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