Georgetown High School TAKS Science Objective 3 Student Review
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13 terms
Terms | Definitions |
|---|---|
 commensalism | one organism benefits (is happy) and one organism is not harmed or helped (is neutral meaning it doesn't really care) |
| mutualism | both organsims benefit (both are happy!) |
| parasitism | one organism benefits (is happy) and one organsims is harmed (is sad) |
| All viruses cause diseases such as | AIDS (from HIV which infect the helper T cells), colds, warts, smallpox, flu (influenza) |
| virus | NOT LIVING, must have living host, cannot be killed with antibiotics |
| bacteria | living (eubacteria or archebacteria kingdom), can be harmful or beneficial, examples: strep throat, staph infections |
| beneficial bacteria | aid in digestion, food making (cheese, yoguar), drugs (inculin), decompose and recycle nutrients |
| harmful bacteria | cause diseases, can spoil food, can be treated with antibiotics |
| trophic levels | 4th Level Tertiary Consumers (less energy then 3rd level) 3rd Level Secondary Consumers (less energy then 2nd level) 2nd Level Primary Consumbers (less energy then 1st level) 1st Level Producers (maximum amount of energy) |
| food energy pyramid | shows what happens to energy in an ecosystem as it flows from one organism to another, top of pyramid less energy, bottom of pyramid more energy (plants are at the bottom) |
| grass (look who ate me!)→deer | food chain or web, grass (energy flow)→deer |
| evidence of change in a species | fossil record, DNA, anatomical similarities (similar body parts), physiological similarities, embryology |
| natural selection | organisms with favorable traits survive and are able to reproduce (survival of the fittest) |
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