Lesson summary for:
Evo in the news: Evolving altitude aptitude
This news brief from October 2010 examines new research that makes it clear that Tibetan highlanders have not just acclimated to their mountain home; evolutionary adaptations have equipped them with unique physiological mechanisms for dealing with low oxygen levels.
UC Museum of Paleontology
- There is a fit between organisms and their environments, though not always a perfect fit.
- 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.
- Natural selection acts on the variation that exists in a population.
- Populations, not individuals, evolve.
- 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.
- Scientists test their ideas using multiple lines of evidence.
- Natural selection is dependent on environmental conditions.
- Evolutionary change can sometimes happen rapidly.
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