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ecology 1.0
first stack
| Question | Answer |
|---|---|
| What is ecology? | The scientific study of interactions among organisms and between organisms and their environments, or surroundings. |
| What is the biosphere? | That which 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 different populations that live together in a defined area. |
| What is an ecosystem? | A collection of all organisms that live in a particular place, together with their nonliving, or physical, environment. |
| What is an autotroph? | Autotrophs use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules. |
| What is a heterotroph? | Organisms that rely on other organisms for their energy and food supply. |
| What is a food web? | Wehn the feeding relationships among the various organisms in an ecosystem form a network of complex interactions, ecologists describe these relationships as a food web. A food web links all the food chains in an ecosystem together. |
| What is a tropic level? | Each step in a food chain or food web is called a tropic level. |
| What is a biomass? | The total amount of living tissue within a given tropic level is called a biomass. Usually expressed in terms of grams of organic matter per unit area. |
| What is a biogeochemical cycle? | 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 limiting nutrient? | When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly |
| What is weather? | The day-to-day condition of Earth's atmosphere at a particular time and place. |
| What is climate? | Refers to 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 by this layer of greenhouse gases. |
| What is a biotic factor? | The 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 the organism uses those conditions. |
| What is logistic growth? | Occurs when a population's growth slows or stops following a period of exponential growth. |
| What is carrying capacity? | Represents the largest number of individuals that a given environment can support. For a particular species. |
| What is demography? | The scientific study of human populations |
| What is demographic transition? | A dramatic change in birth and death rate. |
| What is green revolution? | When modern agricultural techniques wwere introduced, such as monoculture and the use of chemical fertilizers. |
| What is a renewable resource? | Can regenerate if they are alive or can be replenished by natural processes. |
| What is a pollutant? | A harmful material that can enter the biosphere through the land, air, or water. |
| What is biodiversity? | Biological diversity that it the sum total of the genetically based variety of all organisms in the biosphere. |
| What is biological magnification? | Concentrations of a harmful substance increase in organisms at higher trophie levels in a food chain or food web. |
Created by:
WNguyen
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