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The tropical island of Kauai has always been a quiet place, but now it may be getting even more quiet. This news brief, from December 2006, reveals how Kauai's cricket population has evolved into a "chirpless" variety in just a few years.
UC Museum of Paleontology
This article includes a set of discussion and extension questions, as well as links to related lessons that might be used in conjunction with this one. Get more tips for using Evo in the News articles in your classroom.
- 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.
- 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.
- Scientific knowledge is open to question and revision as we come up with new ideas and discover new evidence.
- Scientists use multiple research methods (experiments, observational research, comparative research, and modeling) to collect data.
- Science is a human endeavor.
- There is variation within a population.