Natural selection Learning objectives: -Level 3- Recall that some organisms compete with each other...
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Transcript of Natural selection Learning objectives: -Level 3- Recall that some organisms compete with each other...
![Page 1: Natural selection Learning objectives: -Level 3- Recall that some organisms compete with each other for resources. Level 4- Describe the theory of natural.](https://reader035.fdocuments.us/reader035/viewer/2022081821/56649f3e5503460f94c5f1f2/html5/thumbnails/1.jpg)
Natural selection
Learning objectives:-Level 3- Recall that some organisms compete with each other for resources.Level 4- Describe the theory of natural selection.Level 5- Explain how competition between organisms can lead to evolution.Level 6- Explain why Darwin did not publish his ideas straight away.Level 7- Speculate why some people may have been against Darwin’s ideas when it was first suggested
Key words: Survival of the fittest, selective advantage, variation
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What are the differences between these two moths? Why might one be
better adapted than the other?
Extra challenge: How does the environment affect the number of moths of each colour?
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Survival of the fittest
Use the information from the video to draw a picture explaining “survival of the fittest.” You may only use 2 sentences to explain your picture!
http://www.bbc.co.uk/learningzone/clips/natural-selection-and-survival-of-the-fittest/5516.html.
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Adaptations
• We know that species are adapted to suit their environment (think of the camel and polar bear).
• What happens to those which are not well adapted?
• This is survival of the fittest.
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Darwin’s finches• On his voyage on the Beagle Darwin
stopped at the Galapagos islands.• Here he discovered some unique
species including and observed a variety of finches.
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Darwin’s Finches
From one species of finch, several others have evolved over time. Depending on the environment they inhabit, they have evolved adaptations that make them better suited for their niche.
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Darwin’s finchesDifferent islands in the Galapagos have different habitats and food types.
Discuss: Why might different species of finch exist on different islands?
Extra challenge: How did Darwin use natural selection to explain what he saw on the Galapagos?
Be ready to share your ideas with the class.