"I come from where " , " who am I " , to the mankind, it is a lasting proposition.
All the time since, many scientists think the mankind is from ocean do not have vertebral sponge evolution and come.
However, the research achievement of American Miami university and institute of national mankind gene, offerred another solution to this problem -- comb jellyfish may be the mankind's earliest ancestor.
Comb jellyfish is biology of ocean of shape of a kind of glue, reside coelenterate door. They are mostly colorless, only a few comb board show beautiful iris burnish. Most comb jellyfish still can give off light, in nightly show shallow blue or the light of reseda, this is one of the the most bright-coloured, most beautiful light that the animal can give out.
Long-term since, comb acaleph gene alignment has not been collected by the mankind, researcher tries fill this one blank. They analysed Atlantic of a kind of consist in, common says " sea walnut " the gene of jellyfish of comb of light of great capacity.
The process is here medium, they discover the DNA with this kind of jellyfish and other animal identical existence accidentally. And this kind of acaleph DNA exists extensively in other animal species. This shows it may be the developmental start of these animals.
Say from this meaning, comb jellyfish may be " the animal is the earliest one branch on developmental tree, and the likelihood is ancestor of other and all animal near " . Researcher then guesses, comb jellyfish may be one of human ancestors.
Concerned comb jellyfish is the hypothesis of human ancestor, 2017, new scientist offerred new evidence.
Come from Fan Debao university and Weisikang the research that astral university Mai Dixun distributes the scientists of school to publish says, the technology of a kind of genetic analysis that they design technically supported acaleph and genetic theory. They are right organic life thousands of share gene development to consider to discover, " systematic growth signal " and many share gene, supported " comb jellyfish is all animal ancestor " conclusion.
Nevertheless, but relevant hypothesis still all the time controversy is ceaseless. On the problem that examines minutely human origin, appear to begin only, did not end.
Referenced:
The Genome Of The Ctenophore Mnemiopsis Leidyi And Its Implications For Cell Type Evolution
Forget-sponges-the-earliest-animals-were-marine-jellies By David Salisbury
Science, doi: 10.1126 / Science.1242592, 2013
