Understanding Evolution: your one-stop source for information on evolution
Resource library Teaching materials Evolution 101

Lesson summary for:
Evo in the news: Quick evolution leads to quiet crickets

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Overview:
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.

Author/Source:
UC Museum of Paleontology

Grade level:
13-16

Time:
20 minutes

Teaching tips:
Use this resource to relate evolutionary concepts to the topics of Mendelian genetics, animal behavior, or community ecology (or get more suggestions for incorporating evolution throughout your biology syllabus). 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.

Concepts:
Correspondence to the Next Generation Science Standards is indicated in parentheses after each relevant concept. See our conceptual framework for details.

  • Evolution results from natural selection acting upon genetic variation within a population.

  • Natural selection and genetic drift act on the variation that exists in a population.

  • Inherited characteristics affect the likelihood of an organism's survival and reproduction.

  • 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.

  • Traits that confer an advantage may persist in the population and are called adaptations.

  • Depending on environmental conditions, inherited characteristics may be advantageous, neutral, or detrimental.

  • Scientific knowledge is open to question and revision as we come up with new ideas and discover new evidence.

  • Scientists test their ideas using multiple lines of evidence.

  • Scientists use multiple research methods (experiments, observational research, comparative research, and modeling) to collect data.

  • Science is a human endeavor.

Teacher background:

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