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Honors Bio terms
Flash card terms for Honors Bio
| Question | Answer |
|---|---|
| Ecology | The scientific study of interactions among organisms and between organisms and their environment, or surroundings. |
| Biosphere | The biosphere contains the combined portions of the planet in which all life exists, 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. |
| Populations | 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. |
| Autotroph | Autotrophs use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules |
| Heterotrophs | Organisms that rely on other organisms for their energy and food supply. |
| Food web | When the feeding relationships among the various organisms in an ecosystem for a network of complex interactions. |
| Trophic level | Each step in a food chain or food web. |
| Biomass | The total amount of living tissue within a given trophic level. |
| Biogeochemical cycle | Elements, chemical compounds, and other forms of matter are passed from one organism to another and one biosphere to another through biogeochemical cycles |
| Limiting nutrient | When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly, the substance is called a limiting nutrient. |
| Weather | The day-to-day condition of the Earth's atmosphere at a particular time and place |
| Climate | The average, year-after-year conditions of temperature and precipitation in a particular region. |
| Green house effect | The natural situation in which heat is retained by this layer of greenhouse gases. |
| Biotic factors | The biological influences on organisms within an ecosystem. |
| Abiotic factors | Physical, or nonliving, factors that shape ecosystems. |
| niche | The full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions. |
| Logistic growth | Occurs when a population's growth slows or stops following a period of exponential growth. |
| Carrying capacity | A number that represents the largest number of individuals. |
| Demography | The scientific study of human populations. |
| Demographic transition | A dramatic change in birth and death rates |
| Green revolution | A time when Governments and scientists began an effort to increase food production. |
| Renewable resources | Resources that can generate if they are alive or can be replenished by biochemical cycles if they are nonliving. |
| Pollutant | A harmful material that can enter the biosphere through land, air, or water. |
| Biodiversity | The sum total of the genetically based variety of all organisms in the biosphere. |
| Biological magnification | Concentrations of a harmful substance increases in organisms at higher trophic levels in a food chain or food web. |
Created by:
jgiffin
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