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Ecology Khan
Honors Bio
| Question | Answer |
|---|---|
| Ecology | The scientific study of interactions among organisms and between organisms and their environment, or surroundings. |
| Biosphere | Contains the combined portions of the planet in which all of life exsists, including land, water, and air, or atmosphere. |
| Species | A group of organisms so similar to one another that they can breed and produce fertile offspring. |
| Population | Groups of individuals that belong to the same species and live in the same area. |
| Community | Assemblages of different populations that live together in a defined area. |
| Ecosystem | A collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment. |
| Biome | Group of ecosystems that have the same climate and similar dominant communities. |
| Autotroph | Organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer. |
| Heterotroph | Organism that obtains energy from the food it consumes; also called a consumer. |
| Food Web | Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem. |
| Trophic Level | Step in food chain or food web. |
| Biomass | Total amount of living tissue within a given trophic level. |
| Biogeochemical Cycle | Process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another. |
| Limiting Nutrient | Single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem. |
| Weather | Condition of Earth's atmosphere at a particular time and place. |
| Climate | Average, year-after-year conditions of temperature and precipitation on a particular region. |
| Greenhouse Effect | Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases. |
| Biotic Factor | Biological influence on organisms within an ecosystem. |
| Abiotic Factor | Physical, or nonliving, factor that shapes an ecosystem. |
| Niche | Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions. |
| Logistic Growth | Growth pattern in which a population's growth rate slows or stops following a period of exponential growth. |
| Carrying Capacity | Largest number of individuals of a population that a given environment can support. |
| Demography | Scientific study of human populations. |
| Demographic Transition | Change in population from high birth and death rates to low birth and death rates. |
| Green Revolution | The develpoment of highly productive crop stains and the use of modern agricultural techniques to increase yields of food crops. |
| Renewable Resource | Resource that can regenerate quickly and that is replaceable. |
| Pollutant | Harmful material that can enter the biosphere through the land, air, or water. |
| Biodiversity | Biological diversity; the sum total of the variety of organisms in the biosphere. |
| Biological Magnification | Increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web. |
Created by:
Sunia233
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