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Ecology, Raab
| Question | Answer |
|---|---|
| What is ecology? | The scientific study of interactions among organisms and between organisms and their environment. |
| What is a biosphere? | A part of the earth in which life exists including land, water, and air or atmosphere. |
| What are species? | Groups of similar organisms that can breed and produce fertile offspring. |
| What is population? | Group of individuals of the same species that live in the same area. |
| What is a community? | An assemblage of different populations that live together in a defined area. |
| What is an ecosystem? | A collection of all the organisms that live in a particular place, together with their nonliving environment. |
| What is an autotroph? | An organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer. |
| What is a heterotroph? | An organism that obtains energy from the foods it consumes; also called a consumer. |
| What is a food web? | A network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem. |
| What is a trophic level? | A step in a food chain or food web. |
| What is biomass? | The total amount of living tissue within a given trophic level. |
| What is a biogeochemical cycle? | A 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. |
| What is a limiting nutrient? | A single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem. |
| What is weather? | The condition of Earth's atmosphere at a particular time and place. |
| What is climate? | The average, year-after-year conditions of temperature and precipitation in a particular region. |
| What is greenhouse effect? | A natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases. |
| What is a biotic factor? | A biological influence on organisms within an ecosystem. |
| What is an abiotic factor? | A physical, or nonliving, factor that shapes and ecosystem. |
| What is a niche? | A full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions. |
| What is logistic growth? | A growth patter in which a population's growth rate slows or stops following a period of exponential growth. |
| What is carrying capacity? | The largest number of individuals of a population that a given environment can support. |
| What is demography? | The scientific study of human populations. |
| What is demographic transition? | A change in population from high birth and death rates to low birth and death rates. |
| What is a green revolution? | The development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops. |
| What is a renewable resource? | A resource that can regenerate quickly and that is replaceable. |
| What is a pollutant? | A harmful material that can enter the biosphere through the land, air, or water. |
| What is biodiversity? | Biological diversity; the sum total of the variety of of organisms in the biosphere. |
| What is biological magnification? | THe increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web. |
Created by:
eraab
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