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20bio5785
CU intro to bio: lecture 20
| Question | Answer |
|---|---|
| Community | all the populations of all species in a given habitat |
| population a | group of individuals of the same species in teh same area |
| Species a | type of organism (in regards to sexually reproducing organisms, individuals of a given species can mate and produce fertile offspring) |
| Habitat | a place where an organism lives; described by physical and chemical features and an array of species |
| Niche | the role of a species within a community |
| commensalism | a relationship wherein one species is benefited and the other is unaffected |
| mutualism | a relationship wherein both species are benefited |
| interspecies competition | hurts both species |
| parasitism | helps one species at the other specie's expense |
| examples of mutualism | Plants and Insects Legumes and Rhizobia (Rhizobia, a bacteria, chemically converts nitrogen from the air to be used in legume plants. Plant needs N and bacteria needs a home) |
| Competitive Exclusion | When two species require the same limited resource to survive or reproduce, the better competitor will drive the less completive species to extinction in that habitat. |
| Example of how Species may be able to live together under competitive exclusion ... | Finches in the Galapagos Islands. One species of finch's smaller beak allows it to utilize a different sized seed as a food source as compared to a larger beak. |
| A paristoid is a | parisite that pays eggs in an insect's body and then destroys it. |
Created by:
jseekins
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