Vargas AO, Kohlsdorf T, Fallon JF, VandenBrooks J, Wagner GP (2008) The Evolution of HoxD-11 Expression in the Bird Wing: Insights from Alligator mississippiensis. PLoS ONE 3(10): e3325. doi:10.1371/journal.pone.0003325.
This paper, published Oct.3rd, puts another nail in the coffin of the arguments against the dinosaurian origins of birds. One of the biggest arguments used to "disprove" the dino/bird relationship was that, using embryological evidence, birds have digits 2, 3, and 4 on their hands and lost digits 1 and5, but dinosaurs have digits 1, 2, and 3 and lost digits 4 and 5. Morphologically, bird fingers look like digits 1, 2, and 3, just like dinosaur digits. Vargas and crew looked at the activity of the HoxD-11 in crocodiles, birds and mammals. Mammals express HoxD-11 in digits 2-5, but not in 1, crocs express HoxD-11 in digits 2-5, but not in 1. Guess what? Birds express HoxD-11 in digits 2 and 3, but not in digit 1. So birds do not in fact have digits 2, 3, and 4 like the people who disagree with the dino-bird theory. So their biggest argument has now been quite convincingly obliterated. Think we can end this debate now?
Subscribe to:
Post Comments (Atom)
14 comments:
Directly in яблочко
Hey I'd love to congratulate you for such a terrific quality site!
thought this is a perfect way to introduce myself!
Sincerely,
Sage Brand
if you're ever bored check out my site!
[url=http://www.partyopedia.com/articles/star-wars-party-supplies.html]star wars Party Supplies[/url].
Your blog keeps getting better and better! Your older articles are not as good as newer ones you have a lot more creativity and originality now keep it up!
Genial dispatch and this post helped me alot in my college assignement. Gratefulness you as your information.
You have really great taste on catch article titles, even when you are not interested in this topic you push to read it
Hello. And Bye.
[url=http://kfarbair.com][img]http://www.kfarbair.com/_images/logo.png[/img][/url]
בית מלון [url=http://www.kfarbair.com]כפר בעיר[/url] - שלווה, [url=http://www.kfarbair.com/about.html]חדרים[/url] מרווחים, אינטימיות, [url=http://kfarbair.com/services.html]שקט[/url] . אנו מציעים שירותי אירוח מגוונים כמו כן יש במקום שירות חדרים הכולל [url=http://www.kfarbair.com/eng/index.html]סעודות רומנטיות[/url] במחירים מיוחדים אשר יוגשו ישירות לחדרכם...
לפרטים נא גשו לעמוד המלון - [url=http://kfarbair.com]כפר בעיר[/url] [url=http://www.kfarbair.com/contact.html][img]http://www.kfarbair.com/_images/apixel.gif[/img][/url]
Amiable dispatch and this mail helped me alot in my college assignement. Say thank you you on your information.
hello ppl. I'm actually into shoes and I had been looking for the sake of that singular model. The prices as regards the shoes are about 340 dollars on every site. But finally I set this area selling them for the benefit of half price. I absolutely want those [url=http://www.shoesempire.com]gucci sneakers[/url]. I will definetly order these. what can you say about it?
Il semble que vous soyez un expert dans ce domaine, vos remarques sont tres interessantes, merci.
- Daniel
Тhanks fоr anоther informative blog. Whеre elsе may Ι get that type of informаtiοn ωritten
in ѕuch a perfect mаnner? I've a venture that I am simply now working on, and I have been on the look out for such information. garcinia cambogia - garcinia cambogia - garcinia cambogia gold dr oz garcinia cambogia extract with potassium and hca - pure garcinia cambogia extract ingredients - garcinia cambogia
Check out my web-site; garcinia cambogia premium extract
I think this is аmong thе such a lot impοrtant
information for me. Αnd i'm happy studying your article. However should commentary on few basic things, The site taste is perfect, the articles is truly great : D. Excellent process, cheers
my blog - all natural pure super green coffee bean extract weight loss supplement
I wаs wοndering if уou ever cοnsidered сhanging the
layout of your website? Its vеry wеll written; I love ωhat
уouѵe got to say. Βut maybe yοu could а little moгe in the waу of contеnt so
people cοuld connect with it bеtter. Youѵe got
an awful lot of text fοr only having one оr
2 imagеs. Μaybe you could spаce it out better?
Herе iѕ mу wеb-site; frontier internet
electronic cigarettes, smokeless cigarettes, ecig forum, electronic cigarettes, e cigarette, best e cigarette
Post a Comment