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Unit 2 Ecology-Ridge
Flashcards from Honors Bio Unit 2
| Question | Answer |
|---|---|
| what is ecology? | The scientific study of interactions among organisms and their enviorment, or surrondings |
| What is a biosphere? | Contains the combined portions of the planet in which all of life exists, including land, water, and air, or atmosphere. |
| What is a species? | A group of organisms so similar to one another that they can breed and produce fertile offspring. |
| What is a population? | Groups of individuals that belong to the same species and live in the same area. |
| What is a community? | Assemblages of differnt populations that live together in a defined area. |
| What is a ecosystem? | Collection of all the organisms that live in a particular place, together with their nonliving, or physical,enviorment. |
| What is an autotroph? | Plants, algae, and certain bacteria that can capture energy from sunlight or chemicals and use that energy to produce food. |
| What is a heterotroph? | Organisms that rely on other organisms for their energy and food supply. |
| What is a food web? | Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem. |
| What is a trophic level? | Each 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? | Process in which elements, chemical compounds,and other forms of matter are passed from one organism to anotherand form one part of the biosphere to another. |
| What is a limiting nutrient? | Single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem. |
| What is weather? | The day-to-day condition of Earth's atmosphere at a particular time and place. |
| What is climate? | Average year-after-year conditions of temperature and precipitation in a particular region. |
| What is the green house effect? | The natural situation in which heat is retained by this layer of greenhouse gases. |
| what is a biotic factor? | Biological influences on organisms within an ecosystem. |
| What is an abiotic factor? | Physical, or nonliving, factors that shape ecosystems. |
| what is a niche? | The full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions. |
| What is a logistic growth? | Occurs when a population's growth slows or stops following a period of exponential growth. |
| What is carrying capacity? | Largest number of individuals of a population that a given environment can support. |
| what is demography? | Scientific study of human population. |
| What is demographic transition? | Change in a population from high birth and death rates to low birth an death rates. |
| What is green revolution? | The development of highly productive crop strains and the use of modern agriculture techniques to increase yields of food crops. |
| What is a renewable resource? | Resource that can regenerate quickly and that is replaceable. |
| what is a pollutant? | Harmful material that can enter the biosphere through land, air, or water. |
| What is biodiversity? | biological diversity; the sum total of the variety of organisms in the biosphere. |
| What is biological magnification? | Increasing concentration of a harmful substance in organisms at higher trophic levels in food chain or food web. |
Created by:
austinridge
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