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Lesson: Let's Grub on Some Grass Beetles

Let’s Grub on Some Grass Beetles is a natural selection simulation. Natural selection is the “process by which favorable heritable traits become more common in successive generations of a population of reproducing organisms, and unfavorable heritable traits become less common.” In this activity, part 1 involves variations in silver beak loon beak types. There are tweezers, spoon, and knife shaped beaks. The beak best adapted to capturing grass beetles will survive and more chances to reproduce. The tweezers and spoon beaks are best adapted. The population of silver beak loons will change to a majority of tweezers and spoon beaks. Part 2 deals with variations in grass beetle color. The green grass beetles are best adapted to hiding in the grass than the orange or yellow grass beetles. In successive generations the populations of grass beetles will shift to green colors, since they will have the best chance to survive, reproduce and pass the variation to their offspring.

Watch the video and listen to the commentary on how to do the activity. Download handout: Let’s Grub on Some Grass Beetles

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    ScienceFix - Science Fix - Lesson: Let's Grub on Some Grass Beetles
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    Grubs also nourish on potatoes and carrots in the garden. They slash the major stems or roots of plants under the dirty exterior, and subway into tubers and recently rooted plants.
  • Response
    This is a well-made video to get rid from grass beetles. Daily, I try to read some interesting facts with logic and this lesson on reproducing organisms through natural selection.
  • Response
    The grass was altogether torn up. Sort of like a grass slaughter. I shook my head and looked again pondering what occurred incidentally. My first figure was that a deer got into the yard and uncovered the grass.

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