BERGEN (AP) Here are our dearly common ancestor – or mother: Flat worm!
flatworms that live among sand and mud in ocean and sea, looking insignificant out, mend isse microscopic Makka gives explanation of how life on earth evolved from jellyfish to humans.
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prestigious
This is stated in a study conducted at the Sars Centre in Bergen, and published in the world’s most prestigious scientific journals: British Nature.
– Yes, it is right that we can now affirm that flat worm is the missing link that explains how the development on earth went from jellyfish in the sea to all the world’s animals – including humans, said lead researcher Andreas Hejnol (46) VG.
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FOUND MISSING LINK: Bergen Researcher Andreas Hejnol (46) at Sars- Institute at the University of Bergen awakens now international attention.
Photo: UiB
Trakker on them
He is from Bremen in Germany, having previously researched Hawaii, but the last six years at the university.
JUST AN OPENING: Microscope Photo by a flatworm. It has an opening that is both food and feces, but has two sexes – both male and female function.
Photo: UiB– When you go on a sandy beach or trampled in the mud, so tread almost certainly on such flatworms. But they are so small that you can not beat them. They can be one to two millimeters long.
The world’s scientists in the development of life have known that we came from the ocean, but not about how the transition has gone from simple life forms in the ocean for the more advanced creatures like fish, insects , rats and humans.
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Gen analyzes
– We have discussed for decades where this flat worm belongs. And now we have the answer, thanks to the analysis of genetic material from hundreds of flatworms, and many tens of other beings. This is done in large computers. And the answer we got, hold scientific standard: Flat worm is evolutionary origin of all beings that are symmetrical – that which has a right sites mirroring the left.
This differs flat worm from the other major form of life in the ocean, jellyfish
– The jellyfish are round. Flat worm has a defined right- and left-wing, states Hejnol.
Early life forms
flat worm evolved albeit from the simpler jellyfish for about 600 million years ago. It is a hunter who eats less beings. It just has a body orifice, where it eats – and regurgitates again that it does not take to him. This has the common with very early life forms like jellyfish and anemones.
– First long later evolved beings who have a body opening for bowel movements, he said.
Flat worm was also hermaphroditic – with a function of sperm in one part, and eggs in the other, and flatworms mate also doubled, so two worms fertilize each other.
We were hermaphroditic
– It also means that we in earlier stages of development, has also been hermaphroditic, says Hejnol.
Flat worm is also stamfar- or mother of all beings having a right and left page, such as fish, insects and all companies, which both and two-legged animals.
– the understanding of flatworm position in the development tells us something about when other functions originated in the body:
– Flat worm has no blood, but it has not kidneys. These are the things that have come to the later date.
– How do you react so geneticists internationally towards this world news from Norway?
– They are happy. Finally this determined, and puts an end to decades of debates. They are relieved of this, claims Hejnol.
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