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Biounit3A
edexcel biology terms unit 3
| Question | Answer |
|---|---|
| A Biosphere is | a huge ecosystem. Earth is considered to be a biosphere. |
| An Ecosystem is | A community that lives in a given area and all the non living parts of that area is an ecosystem. |
| A Habitat is | the place where an organism, species, poulation or community lives. |
| Producers are | organisms that transfer and harness energy into organic compounds. |
| Consumers are | organisms that obtain their energy, directly or indirectly, from the energy containing compounds made by producers. |
| Decomposers are | organisms that feed on dead bodies or waste matter from other organisms in the ecosystem and are consumers. |
| Trophic levels are | the position on a food web at which an organism feeds. Producers at the bottom, consumers at the top. |
| A Food chain is | the pathway through which energy is transferred between specific organisms. |
| A Food web is | the pathways through which energy is transferred between all organisms in a specific habitat or ecosystem. |
| A population is | a group of organisms of the same species at the same time that interbreed. Lots of population make up a community. |
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