Friday, October 5, 2012
Cells starting by rapid evolution?
In the 1970s biologist Lynn Margulis proposed that complex cells did not evolve by small mutational steps from bacterial cells, but by symbiotic associations of different kinds of bacteria that became higher level organisms in their own right. Although, in 1990s, evolutionary biologists John M. Smith and Eors Szathary proposed that similar major transitions occurred throughout the history of life, including the evolution of the first cells, the event of multicellular organisms, and the development of social insect colonies. They also suggested it could explain the origin of life, with groups of cooperating molecular reactions coming together to create the first life forms.
Wednesday, September 26, 2012
Thursday, September 20, 2012
5 W's and 1 H for Evolution
Who?
Who is effected by evolution?What?
What can evolution cause?Where?
Where is the signs of evolution?Why?
Why does evolution bring up so much conflict?
When?
When has evolution been very noticeable in different speciesHow?
How does evolution really work?Friday, September 14, 2012
Wednesday, September 12, 2012
Saturday, September 8, 2012
Friday, September 7, 2012
Is it True?
Have you ever wondered about how modern day animals came to exist? Or how mammals are slowly adapting to the aquatic world of oceans and lakes? Do you think evolution could have caused such creatures as mermaids and other "non-real" creatures? Evolution is a mysterious topic to me because it has so many ways to enhance or effect so many different species. It created everything we see today. For example polar bears were once grizzly bears that migrated to colder climates and adapted so well to the water and cold that they now have thicker fur, webbing between their toes, and can hold their breath for quite some time. Also Antarctic fish have become able to deploy antifreeze proteins to survive in cold waters. Even the tasty Viceroy butterflies escape predators by adapting to look like the more toxic monarch butterfly.
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