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Adaptation 7th Grade
| Term | Definition |
|---|---|
| Species | A group of organisms that possess similar genes and traits which no other group possesses. |
| Genetic Variation | Slight differences in an organism's traits that are considered normal. |
| Phenotype | The physical appearance, behavior or trait of an organism. |
| Trait | One form of a visible characteristic or behavior determined by a particular allele. |
| Allele | Different forms of the same gene that contain slightly different genetic information for slightly different traits. |
| Dominant | An allele that will produce a trait that masks another (recessive) trait for the same characteristic. |
| Recessive | An allele that produces a trait that is masked by a dominant trait. |
| Genotype | The genes that determine an organism's phenotype. |
| Environment | An organism's physical surroundings, such as food supply, soil, weather, water, trees, and mountains. |
| Adaptation | An increase in the proportion of the individuals of a species that possess a necessary trait, allowing the species to survive a change in an environmental factor. |
| Extinct | When all individual organisms of a species have died. |
| Environmental Pressure | A change in an organism's environment that selects for organisms with slight differences in a trait that give that organism a survival or reproductive advantage. |
| Natural Selection | Sometimes called "Survival of the Fittest." |
| Fossil | The remains of an organism, often its bones that are left after it has died. |
| Paleontologist | A scientist who uses fossils to study organisms that once existed but are now extinct. |
Created by:
ireneott
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