Biology Re-Takes
Terms
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- What are autotrophs?
- self feeding organisms
- what do saprophytes eat?
- dead organic matter
- what do scavengers eat?
- prey-meat. dead matter
- symbiosis
- a close nutritional relationship between two organisms
- commensalism
- benefit/unaffected
- mutualism
- benefit/benefit
- parasitism
- benefit/harmed
- what is a niche?
- the role organism play in enviorment. what they eat, what eats them, interactions. so on.
- what happens when two organisms occupy the same niche?
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competition
squirrel-chipmunk - what do humans to do ecosystems?
- disrupt them
- give three examples of how humans impacted the stability of an ecosystem?
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-biocide
-urbanization
-pollution
-landfills - what is biodiversity?
- number of different types of organisms that live on the earth
- what is the value of biodiversity?
- genetics/medicine/prevention of ecosystem collapse
- what is biological magnificcation?
- the process of passing toxic substance through a food chain. this results in a high level of the toxins in higher order consumers.
- give three examples of how humans have tried to restore the enviorment
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1. pollution control
2. recycling
3. soil conservation
4. forest conservation
5. biological control of pest
-alternativees to pesticidde - what is the difference between a community and an ecosystem?
- the physical enviorment