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Ecology Janes
Scientific Study of interactions between organisms and environment
| Question | Answer |
|---|---|
| What is ecology? | The scientific study of interactions among organisms and between organisms and their environment or surroundings. |
| What is a biosphere? | A biosphere contains the combined portions of the planet in which all of life exists, including land, water, and air, or the atmosphere. |
| What is species? | Species is a group of organisms so similar to one another that they can breed and produce fertile offspring. |
| What is a population? | A population is a group of individuals that belong to the same species and live in the same area. |
| What is a community? | A community is an assemblage of different populations that live together in a defined area. |
| What is an ecosystem? | An ecosystem is a collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment. |
| What are autotrophs? | Plants, some algae, and certain bacteria that can capture energy from sunlight or chemicals and use that energy to produce food. |
| What are heterotrophs? | Organisms that rely on other organisms for their energy and food supply. |
| 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 trophic level is 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 organisms to another and form 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? | Weather is the condition of Earth's atmosphere at a particular time and place. |
| What is climate? | Climate is the 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 in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases. |
| What is a biotic factor? | The biological influence on organisms within an ecosystem. |
| What is an abiotic factor? | A physical, or nonliving, factor that shapes an ecosystem. |
| What is a niche? | A niche is 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? | The growth pattern 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? | Demography is the scientific study of human populations. |
| What is a demographic transition? | Change in a population from high birth and death rates to low birth and death rates. |
| What is the green revolution? | The development of highly productive crop strains and the use of modern agricultural techniques to increase yiels 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? | The biological diversity; the sum total of the variety of organisms in the biosphere. |
| What is a biological magnification? | A biological magnification is the increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web. |
Created by:
daph7
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