Link: http://www.newscientist.com/article.ns?id=dn10586&feedId=online-news_rss20
Summary: This article starts buy describing the 2 different species involved in the experiment
Anolis sagrei and the larger Leiocephalus carinatus, which prey on the Anolis sagrei. The point of the expierment was to find out if introducing the L. carinatus, would cause the A. sagrei to grow longer legs to get away from the L. carinatus. They also hypothesised that in time the legs would shrink and the lizards would go to the trees to escape their predators. After 6 months the first became true their was a greater number of long legged lizards then short, and after another 6 months their second prediction came true.
How is natural selection or evolution illustrated in this article? Natural selection is illustrated by the lizards need to escape predators so they grew longer legs and after time found that shorter legs enabled them to climb trees.
How does this support Darwin original findings? In Darwin's original theory he stated that organisms change to help them survive and, to escape predators (survive) the lizards grew longer legs.
List three things you learned from this article in your own words. Natural selection does not take a long time, It can happen more than once over a short period of time, and natural selection can be experimentally induced.
What impact would the absence of this organism have on the ecosystem? The Anolis sagrei and the Leiocephalus carinatus are located on different islands so removing one will not have a great impact on their ecosystem.
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