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from the topologically-speaking-you-are-a-torus dept.
The mouth and anus are not connected in the development of the embryo as earlier thought, shows a Norwegian ground-breaking study.
Animals often form either the mouth or the anus from an opening that appears in the early embryo, which is called the blastopore.
For instance, starfish develop the anus from the blastopore, but earthworms form the mouth out of it. How this happens has not been clear until now.
"Our findings demonstrate that whether the blastopore forms the mouth or the anus is a consequence of how each embryo is organized during early development. It is not a predefined attribute of the species, as previously thought," says postdoctoral researcher Jose Maria Martin-Duran, at the Hejnol Group at Sars Centre at the Department of Biology, University of Bergen (UiB).
"One of the most important conclusions of our work is that there is no necessary association of the mouth and the anus with the embryonic blastopore," says Martin-Duran.
The developmental basis for the recurrent evolution of deuterostomy and protostomy (open, DOI: 10.1038/s41559-016-0005) (DX)
(Score: 2) by inertnet on Friday December 30 2016, @12:06PM
I'm glad that we can tell them apart now.
(Score: 4, Funny) by art guerrilla on Friday December 30 2016, @02:08PM
step two is to tell it apart from a hole in the ground...
(Score: 0) by Anonymous Coward on Friday December 30 2016, @03:16PM
Except for politicians, who talk out of their sphincter.
(Score: 2) by aristarchus on Saturday December 31 2016, @12:16AM
ποιμένες ἄγραυλοι, κάκ᾽ ἐλέγχεα, γαστέρες οἶον,
ἴδμεν ψεύδεα πολλὰ λέγειν ἐτύμοισιν ὁμοῖα,
ἴδμεν δ᾽, εὖτ᾽ ἐθέλωμεν, ἀληθέα γηρύσασθαι.
Hesiod, Theogony [tufts.edu]
(Score: 2) by aristarchus on Saturday December 31 2016, @05:34AM
That Feeling When: you get modded "offtopic" by someone who cannot read Greek. Oh, Mores! Oh, Tempura! Oh, Literatti!