Only the Strong Survive
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Uploaded by awwalker99 on Dec 17, 2006
The oxygen revolution and endosymbiosis:
When the earth's atmosphere first existed, it was anaerobic. This non-oxygenated atmosphere soon changed as cyanobacteria released large amounts of oxygen as a result of photosynthesis. This new atmosphere was toxic to many organisms, causing them to die. However some forms of free-living bacteria were able to process oxygen. These organisms moved into others, which were unable to process oxygen, in a process called endosymbiosis. The decedents of the free-living bacteria are today's mitochondria, which can be proven by the fact that mitochondria keep their own DNA. The presence of mitochondria allows many organisms to perform aerobic respiration in today's oxygenated world.
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@xxTaKe2xx Happy Together, by The Turtles
PatriasCapitalismYPs 9 months ago
what was the song ?
xxTaKe2xx 11 months ago
me too :S
carodeg 1 year ago
i have a bio. paper to write and all that i will remember will be that song
AndrEwsskon 3 years ago
You may consider changing the title. This is a widely held yet incorrect description of Natural Selection. The excellent movie on Endosybiosis showed it wasn't STRENGTH that carried the day. It was cooperation which does challenge another myth of evolution: Evo is all about kill or be killed...but that's another story. NICE VID!
picardposer 3 years ago
=0
I'm goint to have a biology test tomorrow x_x
;3 thanks!
zeldavampire 3 years ago
When it comes to the survival of the cutest, I think we have a tie.
larodem 4 years ago
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brittneyshowswomanxu 4 years ago
love it! i haven't seen endosymbiosis happening that clearly since lynn showed me an animation her students did many years back, congratulations on getting a difficult idea across with a spoonful of sugar. sweet! sh
SamuelHammer 5 years ago