Unit 1 Biology
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Created by:
jellybellybean94 on October 6, 2009
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51 terms
Terms | Definitions |
|---|---|
 organism | an individual living thing |
| population | a group of ogranisms of one species that interbreed and live in the same area |
| community | collection of interacting populations |
| ecosystem | interactions between living and non-living things |
| biophere | portion of the earth that supports life |
| ecology | scientific study of interactions among organisms (biotic) and their environments (abiotic) |
| compost | nutrient rich substance |
| biodiversity | all life forms on earth |
| watershed | all of land area that contributes runoff to a particular body of water |
| point source pollutant | comes from a known source like a factory |
| non point source pollutant | comes from an unknown source like fertilizer |
| erosion | displacement of solids like soil and sediment |
| ecotone | plant communites that blend into one another |
| edge communities | communities that meet at sharply defined margins |
| edge effect | change in biodiversity resulting from thechange of an ecotone to an edge commmunity |
| advancing margin | a mix of ecotone and high contrast margin |
| complete metamorphosis | an insect with four different life stages |
| incomplete metamorphosis | an insect with three stages of life |
| benthic macroinvertebrate | an animal without a backbone that lives at the bottom of a body of water. |
| matter | recycled between ecosystems |
| transpiration | how is water released from plants? |
| water cycle | what cycle applies to: all living things need water? |
| gas | how is carbon released from living organisms? |
| DNA, protein | what does carbon help with? |
| Carbon, Nitrogen, Phosphorus, Water | What four cycles are important to all living things? |
| dentrification | how is nitrogen released from animals? |
| nitrogen | what helps organisms make aminos acids that are then used to make protein which helps build cells and your dna structure |
| sunlight | what is the main energy source for life on earth? |
| autotroph | what is also called a producer? |
| producer | what uses energy from environment to fuel the assembly of simple inorganic compounds into compled organic molecules. |
| heterotroph | what is also called a consumer and relies on other organisms for energy nd food |
| herbivore | what heterotroph eats plants |
| carnivore | what heterotroph eats animals |
| omnivore | what heterotroph eats plants and animals |
| detritivore | what heterotroph eats plant and animal remains |
| decomposer | what heterotroph breaks down organic matter |
| biomass, energy, pyramid of numbers | what are the three ecological pyramids? |
| energy | which pyramid is how much energy is available at each trophic level? |
| biomass | which pyramid is the amount of living tissue in a trophic level |
| Pyramid of numbers | which pyramid is each number of organisms in a trophic level |
| symbiosis | any relationship where two species live close together. |
| mutualism | both species benefit |
| commensalism | one member benefits |
| parasitism | when one lives in or on another organism |
| carrying capacity | the number of organisms one species that an environment can support |
| S | what kind of graph shows logistic growth |
| lag one phase | the population increases slowly as the few starting members have offspring |
| log phase | the rate of population growth increases rapidly because the total number of reproductive members increases. |
| birthrate, deathrate, emigration, immigration | what four factors contribe to population changes? |
| exponential growth | when the population gets larger, it grows faster (J) |
| logistic growth | when growth slows, or stops, following a period of exponential growth (S) |
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