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chapter 5/
| Term | Definition |
|---|---|
| Evolution | A general term, means "change over time". |
| Gene | A sequence of DNA that codes for a particular trait. |
| Mutations | changes in DNA |
| Genetic drift | biological evolution that occurs by chance. |
| Natural selection | The process by which traits that improve an organism's chances for survival and reproduction are passed on more frequently to future generations than those that do not. |
| Fitness | describes how re productively successful an organism is in its environment. |
| Adaption | A heritable trait that increases an individual's fitness. |
| artificial selection | process of selection conducted under human direction. |
| Speciation | The process by which new species are generated. |
| Extinction | the disappearance of a species from Earth. |
| niche | describes its use of resources and its functional role in a community. |
| Tolerance | the ability to survive and reproduce under changing environmental condition. |
| Resource partitioning | the species partition or divide the resource they use in common by specializing in different ways. |
| Predation | the process by which an individual of one species a predator, hunts, captures, kills and consumes an individual of species ,the prey. |
| Coevolution | The process by which two species evolve in response to changes in each other. |
| Parasitism | a relationship in which one organism, the parasite, depends on another, the host, for nourishment or some other benefit. |
| Symbiosis | a long-lasting and physically close relationship in which at least one organism benefits. |
| Herbivory | The interaction in which an animal feeds on a plant. |
| Mutualism | A relationship in which two or more species benefit. |
| Commensalism | a relationship in which one species benefits and other is unaffected. |
| Primary producers | capture energy from the sun or from chemicals and store it in the bonds of making Sugars. |
| photosynthesis | the process by which primary producers use sunlight to carbon dioxide and water into sugars. |
| chemosynthesis | primary producers such a as bacteria use energy stored in the bonds of hydrogen sulfide to convert carbon dioxide and water into sugars. |
| consumers | organisms that rely on other organisms for energy and nutrients. |
| cellular respiration | the process by which organism use oxygen to release the chemical energy of sugars such as glucose release carbon dioxide and water into sugar |
| herbivores | organisms that consume producers are known as primary consumers. |
| carnivores | most secondary and tertiary consumers that kills and eats other animals. |
| omnivores | animals that eat both plants and animals. |