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teacher's notes
| Question | Answer |
|---|---|
| In order for a population to evolve, organisms in the population must have differences or | genetic variations |
| There are 5 mechanisms that change the gene frequencies in a population. They are ________________ | gene flow , sexual selection, natural selection, mutations, genetic drift, and gene flow |
| A change in a DNA sequence, usually occurring because of errors in replication or repair. | mutation |
| The ultimate source of genetic variation. | mutation |
| ___________-The change in allele frequencies in a population due to random events like habitat destruction which results in changes in successive generations. | genetic drift |
| A process of evolution in which traits that result in better fitness of an individual survives to the next generation. Survival of the fittest! | natural selection |
| is defined as the process whereby organisms with the best genetic adaptations will survive and reproduce. | natural selection |
| Theory in which populations will inherit small changes over time. | evolution |
| A ___ is more than an educated guess. It is a widely accepted set of explanations of observations and phenomena. | theory |
| - An inherited characteristic that increases the chance of survival | adaptation |
| In ________, human breeders, rather than the environment, select the variations of traits to be passed to offspring. | artificial selection |
| Darwin provides a mechanism for evolution to occur. He proposed that _____ took place as individuals best suited to the environment survived and reproduced. | natural selection |
| Charles Darwin realized that the measure of success for an organism was not only a long period of survival but also successful | reproduction |
| Every organism must either carry out ___ or become extinct. ( A characteristic of all living things) | reproduction |
| ______ The chance of an individual migrating to another population and sharing its genes there. | gene flow |
| The study of extinct Life. | paleontology |
| The study of organisms at an early stage of development provides evidence of possible common ancestors between two different species. | embryology |
| Organs or structures that have been reduced in size in an organism that suggests that they adapted to life without their use. | vestigal structures |
Created by:
jimminyki