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Students learn about variation, reproductive isolation, natural selection, and adaptation through this version of the bird beak activity.
UC Museum of Paleontology
One class period
- Evolution results from selection acting upon genetic variation within a population.
- Traits that confer an advantage may persist in the population and are called adaptations.
- Inherited characteristics affect the likelihood of an organism's survival and reproduction.
- Depending on environmental conditions, inherited characteristics may be advantageous, neutral, or detrimental.
- Random factors can affect the survival of individuals and of populations.
- Natural selection acts on the variation that exists in a population.
- Over time, the proportion of individuals with advantageous characteristics may increase (and the proportion with disadvantageous characteristics may decrease) due to their likelihood of surviving and reproducing.
- There is variation within a population.
- The number of offspring that survive to reproduce successfully is limited by environmental factors.
- Natural selection is dependent on environmental conditions.