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Evolution
| Question | Answer |
|---|---|
| What is evolution? | The slow and continuous change in hereditary features of a population over time. |
| Define population | A group of organisms of the same species that live together in the same environment. |
| Define species | Organisms that are so closely related to each other that they can reproduce (same kind) |
| What is natural selection? | SURVIVAL OF THE FITTEST! Organisms that are best adapted to their environment survive and reproduce |
| Define variation | An inherited trait or behavior that makes one organism different from others of the same species. Variations become adaptations. Ex: Coat color on dog |
| Define adaptation | Variations that aid in survival. Ex: Birds beaks being different sizes |
| Define competition | Individuals indirectly or directly fighting for survival. Ex: food or mates |
| Define overproduction | A species produces more offspring than can survive. Ex: a litter of dogs |
| Define selecting agents | Predators, germs or environmental factors that can affect the survival of an organism |
| Define mutation | A permanent change in a gene or chromosome (NEW GENE) that causes variations. These can be helpful, harmful or have no affect at all. |
| What does a favorable mutation do? | Improves the survival of a species |
| What are the 4 pieces of evidence for evolution? | Fossils, cells, embryos and homologous structure and origin of body parts. This evidence suggests we all evolved from a common ancestor. |
| Just before winter, the hair on horses grows thicker. This is an example of what? | An adaptation |
| Some species of fish live most of their lives in saltwater but lay their eggs in freshwater. Their ability to survive in different environments is an example of... | An adaptation |
| The study of mutations is important to the modern theory of evolution because it helps to explain... | The appearance of variations in organisms |
| A favorable mutation would be one that... | Improves the survival of a species |
| How does natural selection operate to change an environment? | Members of a population differ so that only some will survive environmental changes |
| In an ecosystem, squirrals feed on acorns that house seeds for oak trees. In relationship to the survival and reproduction of the oak tree species, the squirrels act as... | A selecting agent |
| Why did giraffes necks get longer over time? | The longer necked giraffes were able to reach the tops of trees for food, therefore they were living and reproducing and shorter necked giraffes died out. Natural selection |
| With the black and white moths, how does the difference in their ability to survive in their environment on dark trees? | The white moths are seen more easily and will be more likely to be seen and eaten by predators. |
Created by:
kosterman
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