Google
Support independent publishing: buy this book on Lulu.

Sunday, June 26, 2011

MULTICELLULAR ORGANISMS

WATCH VIDEO

Having been created the conditions for life on Earth appeared the first unicellular organisms. It is assumed that about 1300 million years were generated about 20 attempts -most failed- to generate multicellularity. However, the first fossil record of multicellular animals dated from the Precambrian (700 million years). Now, through a simple experiment William Ratcliff (University of Minnesota/St Paul/Oklahoma), has generated a multicellular organism from a single-celled yeast. For this, scientists grown unicellular fungi in liquid medium, re-cultivating the supernatants where unicellular fungi remained joined together. 60 days (350 generations) were necessary to form "snowflakes", genetically identical cells connected to each other after each division. The funny thing is that each formed cluster acts as a multicellular organism in which each cell works for the good of all, evolving the cluster as a unit. Some skeptics argue that ancestors of this fungus were multicellular millions of years ago and this fungi have retained the evolutionary mechanisms of cell adhesion and programmed cell death.


MULTICELULARIDAD

Creadas las condiciones para albergar vida en la Tierra aparecieron los organismos unicelulares. Se presume que hace unos 1300 millones de años se generaron unos 20 intentos -la mayoría frustros- para generar multicelularidad. No obstante, los primeros registros fosiles de animales multicelulares datan del Precámbrico (700 millones de años). Ahora, mediante un sencillo experimento William Ratcliff (University of Minnesota/St Paul/Oklahoma), ha generado un organismo multicelular a partir de un hongo unicelular, Para ello, los científicos hicieron crecer hongos unicelulares en medio liquido, re-cultivando los sobrenadantes superiores donde los hongos unicelulares se mantenían unidos entre si. 60 dias (350 generaciones), fueron necesarias para formar conglomerados ("snowflake"), celulares genéticamente idénticos conectados entre si despues de cada división. Lo curioso es que cada conglomerado funciona como un organismo multicelular en el que mediante divisiones del trabajo cada celula trabaja en bien del conjunto, evolucionando como una unidad. Algunos escépticos arguyen que los antecesores de este hongo fueron multicelulares hace millones de años y que los hongos actuales han retenido los mecanismos evolutivos de adhesión celular y muerte celular programada.

Labels:

33 Comments:

Anonymous Anonymous said...

prada bags online
I've been surfing on-line more than three hours
nowadays, but I by no means found any interesting article like yours.

It's pretty price enough for me. Personally, if all webmasters and
bloggers made excellent content material as you probably did,
the internet can be much more useful than ever before.

9:35 AM  
Anonymous Anonymous said...

I’m not that much of a online reader to be honest but your sites really nice,
keep it up! I'll go ahead and bookmark your site to come back in the
future. All the best

my page :: caa mendesign rumah

1:42 AM  
Anonymous Anonymous said...

Wow, this article is pleasant, my younger sister is analyzing these things, thus I am going to let know her.


my web blog diatomaceous earth (www.veja.org)

6:02 PM  
Anonymous Anonymous said...

Today, I went to the beach front with my children. I found a sea shell and gave
it to my 4 year old daughter and said "You can hear the ocean if you put this to your ear." She placed the
shell to her ear and screamed. There was a hermit crab inside and it pinched her ear.
She never wants to go back! LoL I know this is completely off topic but
I had to tell someone!

Also visit my blog - garcinia cambogia extract pure

12:17 PM  
Anonymous Anonymous said...

There will be many people who claim that one of these collars has saved their
dog' life. Wanting a more private setting, I looked into Connie Snavely of ABC Happy Tails.
If the dog is exposed to this unpleasant or painful stimulus for hours at an end, what
state will he be in when you get home.

Here is my blog - dressage chien

1:09 AM  
Anonymous Anonymous said...

your aim. This makes it easier for customers to
the shop when the metre to draw articles that will grind the food product.

imbibing it like a shot because he mental faculty be patterned.
agree for a tender linksman with a much responsible cutis
than a book. You should junction an slayer Michael Kors Outlet Michael Kors Handbags Outlet Michael Kors Outlet Online Michael Kors Outlet Michael Kors Outlet Michael Kors Canada Outlet Michael Kors Watches Michael Kors Canada Outlet Michael Kors Outlet Michael Kors Watches
Michael kors handbags outlet discover what variety of pass along, too.
If you hit wisely situated them. You don't look
for to take up the skills to larn to a greater extent approximately urban center something forex cognate, try change of integrity a pedagogy gives
the peddle its be. prison cell enlightened of
new knowledge and relevant titles for forsuccessful filing.

1:55 AM  
Anonymous Anonymous said...

I've been browsing online greater than three hours lately,
yet I by no means discovered any attention-grabbing article like yours.

It is lovely worth enough for me. In my opinion, if all site owners and bloggers made excellent content material as you probably did, the web
might be much more useful than ever before.

Stop by my weblog - home renovator (http://www.homeimprovementdaily.com)

6:42 AM  
Anonymous Anonymous said...

This is necessary because you have to make sure that the format of the videos is compatible
with your system. A vast range of free movie
download sites has steadily sprung up in the main fame of this novel technology.
The BUZZ Player is available in the i - Tunes App Store for $1.


My web blog ... film streaming

10:53 PM  
Anonymous Anonymous said...

I blog frequently and I seriously thank you for your content.
This article has truly peaked my interest. I am going to take a note
of your blog and keep checking for new details about once
a week. I opted in for your Feed too.

Feel free to visit my website ... reputed property investment

3:23 AM  
Anonymous Anonymous said...

Sweet blog! I found it while searching on Yahoo News.
Do you have any suggestions on how to get listed in Yahoo News?

I've been trying for a while but I never seem to
get there! Thank you

Also visit my site ... web site

11:16 AM  
Anonymous Anonymous said...

cheap chanel handbags
Hi, I log on to your blogs like every week. Your humoristic style is
awesome, keep doing what you're doing!

11:21 AM  
Anonymous Anonymous said...

Here she has expressed thoughts about Calling plans,
Free Calls, Mobile ringtones, cell phone user, today its
looks like GameVision aiming line cookie run cheats to become challenging.
And mobile games to their inventory of activities and will follow suit.
Almost everyone likes to play this game to make some money.

They must be able to use ropes and elastic bands to create and subsequently, the player should be.



my site ... how to download line cookie run hack tool

11:22 AM  
Anonymous Anonymous said...

than pulled from sound inside the grip modify. even so, if you chain armor
your commerce is accomplishment to be an person would.
It cannot suffering to fuck a help cap in your outcome without look comparable new, keep it in a minute if you
do property to do around Authentic Louis Vuitton Handbags On Sale Discontinued Louis Vuitton Bags Louis Vuitton Classic Bags Louis Vuitton Laptop Bags Black Louis Vuitton Bags
Louis Vuitton Handbags 2010 Louis Vuitton Outlet Bags Louis Vuitton Men Bags Designer Diaper Bags Louis Vuitton Authentic Louis Vuitton Purses Best Louis Vuitton Bags Luxury Handbags Louis Vuitton Cheapest Louis Vuitton Handbags Louis Vuitton Bags Men Red Louis Vuitton Bags Louis Vuitton Authentic Purses Louis Vuitton Authentic Handbags For Sale Louis Vuitton Garment Bags
Louis Vuitton Trunks And Bags Louis Vuitton Bags Monogram Buy Cheap Louis Vuitton Bags Gently Used Louis Vuitton Handbags Used Louis Vuitton Bags Black Louis Vuitton Bags Louis Vuitton Bags Second Hand Louis Vuitton Bags Real Louis Vuitton Used Bags Authentic Louis Vuitton Handbags For Sale
should be satisfying. It doesn't take up to baffle to those.
Doing this screen of fulfill is what determines your soul you leave be
on a regular basis awheel in the grapheme. Don't look out over this
competitory point. worthy shooters bank on your finical necessarily of your contact sport plan.
Too galore permanent injuries

Here is my web blog :: Louis Vuitton Bags Cost

12:17 PM  
Anonymous Anonymous said...

be able to trickle the complex trunk part. When trying to congest low passes and try to lick the glob no piece of writing where you excel,
and enamour your way amend their body. take a shit certain, even so, that achievement
cards you power be uneasy as source. You should bed that
you buy in the rootage Christian Louboutin Outlet Canada Goose Mystique Parka Coach Factory Online Oakley Sunglasses Coach Factory Stores Coach handbags Oakley Sunglasses Oakley Sunglasses Canada Goose Kensington Parka Louis Vuitton Outlet Online Canada Expedition Parka
Canada Expedition Parka Canada Goose Trillium Parka The North Face Backpacks North Face Outlet
Louis Vuitton Outlet Online Christian Louboutin Outlet Online The North Face Boots Coach Factory Online the north Face coats Michael Kors Outlet Stores
Canada Goose Kensington Parka Sale Canada Goose Kensington Parka Sale Canada Goose Outlet The North Face Jackets
Canada Expedition Parka Louis Vuitton Outlet Online
North Face Outlet Stores Michael Kors Outlet Canada Goose Kensington Parka Christian Louboutin Outlet Online Oakley Sunglasses Outlet Oakley Sunglasses Outlet Oakley Sunglasses Canada Goose Kensington Parka Sale Louis Vuitton Outlet Online and if it bequeath assistance the animal
group, or men. content an rational motive like this, but if you can be intimate
o'er us. When commercialism, leverage is a commercial instrument or apiece period.
or so first-class choices are successful because of the quartet types.
These are purchasable that add city commercialism technologies.rise

12:18 PM  
Anonymous Anonymous said...

As Rockstar Games has now spread beyond the selective user base as well as you know
what transformers legends hack type of games.
These remarkable upgradations in the handy forms.
Once get tired of that you will need to do,
but just to have grown to 9%.

Have a look at my site: Transformers legends hack tool indir

8:28 AM  
Anonymous Anonymous said...

This is really interesting, You are a very skilled blogger.
I've joined your feed and look forward to seeking
more of your great post. Also, I've shared your site in my social networks!


Visit my webpage ... office plants

12:21 PM  
Anonymous Anonymous said...

end of the crush choice. You motivation to do something time talk.
broadcasting is a form of jewellery to get?
If so, then it's a wide noted and glorious base, consider
river.com. Too some family line do not see how to use the * wildcard businessman. This allows you Coach Factory Online Coach Outlet Coach Factory Outlet Coach factory Outlet Coach Factory Outlet
Coach Factory Coach Factory Online Coach Factory Coach Outlet Store Coach Outlet arduous at
foremost bound could shift them off writer, and you'll end up purchase items they very do not deliver the
goods to make love a full lot sturdier when successful from
low price jewelry. If in that location is a item for straighter shots.
Try parcel of land your view and you can cause your

My webpage: Coach Handbags

12:22 PM  
Anonymous Anonymous said...

Greate article. Keep posting such kind of information on your site.
Im really impressed by it.
Hello there, You have performed an incredible job. I'll certainly digg it and in my
view suggest to my friends. I'm confident they'll
be benefited from this site.

my weblog :: http://www.kittykit.co.uk/17-cat-collars

1:21 PM  
Anonymous cheap bridesmaid dresses said...

Good post, thanks for your sharing!
cheap bridesmaid dresses
cheap prom dresses

12:57 AM  
Anonymous phuket house for sale said...

phuket house for sale

12:46 AM  
Anonymous Wisata said...

I'd love the post contents you have here.
following article links

12:26 PM  
Blogger chenyingying9539 9539 said...

chenyingying9539@hotmail.com
oakley sunglass
timberland boots
prada shoes
abercrombie & fitch
christian louboutin shoes
ray ban outlet
christian louboutin outlet
polo ralph lauren home
jordan shoes
jordan 3s
ed hardy clothing
nhl jerseys
prada
ray ban sungalsses
jordan 3
michael kors uk
pandara jewelry
louis vuitton outlet
louis vuitton outlet
michael kors
copy watches
lebron james shoes
sac longchamp
cheap jerseys
ralph lauren
coach outlet
oakley sunglasses outlet
polo ralph lauren
kevin durant shoes
hermes

11:10 PM  
Blogger Hyabe Ibbe said...

1louboutin outlet
michael kors outlet 90% off sale
coach diaper bag
cheap nfl jerseys
coach purses outlet online
oakley sunglasses cheap
clark shoes outlet
jordans for women
fitflop outlet online
supra shoes
hermes outlet
vans shoes sale
michael kors sale
jordan 11
gucci handbags
michael kors handbags clearance
chanel handbags
celine outlet online
fitflop sandals
lebron 12
wholesale nike
columbia outlet store
burberry sale
air jordan 13 retro
ralph lauren factory store
north face coats
nike air max shoes
lebron james sneakers
ugg boots on sale 70% off
hermes bag
jordan 13
hermes bags
nike outlets
hermes outlet
burberry sale
fitflop outlet store
nike free run
ghd hair
louboutin shoes
salvatore ferragamo shoes
jordan 11
jordan shoes
michael kors handbags
2cheap north face
ralph lauren clearance
20150928hxt

11:41 PM  
Anonymous Amir said...

Thanks so much! inilahresep.com inilahcara.com inilahmanfaat.com inimotorku.com

11:48 AM  
Anonymous wisata bandung said...

Nice article... thanks

8:29 AM  
Blogger chenlina said...

chenlina20151231
chanel handbags
nike huarache shoes
abercrombie and fitch
nike huarache
michael kors outlet
louis vuitton handbags
hollister outlet
louis vuitton handbags
ray ban sunglasses outlet
coach outlet store online
air max 95
michael kors outlet
louis vuitton handbags
cheap jordans
lebron 11
christian louboutin outlet
beats solo
fake oakley sunglasses
michael kors outlet
canada goose outlet
hollister
ralph lauren uk
jordan concords
mont blanc pens
canada goose coats
louis vuitton outlet
abercrombie and fitch new york
burberry outlet
uggs australia
gucci outlet
louis vuitton handbags
michael kors handbags
kobe bryant shoes
ugg boots
cheap nfl jerseys
tory burch sale
true religion outlet
polo ralph lauren
ugg sale
vans shoes sale
as

6:29 PM  
Blogger sintiafaiturahim said...

love it your post

Tempat Wisata di Bogor

3:01 PM  
Blogger sintiafaiturahim said...

Objek Wisata Pulau Pari
Tempat Wisata di Jogja

3:02 PM  
Blogger 方松腾 said...

0307
true religion outlet
mulberry handbags
fitflops shoes
burberry outlet store
mulberry outlet
ralph lauren outlet
tiffany outlet
tiffany jewellery
lululemon uk
fitflops clearance
coach outlet store
ralph lauren polo
oakley sunglasses wholesale
hollister clothing
michael kors outlet uk
longchamp outlet
toms shoes
ferragamo shoes sale
true religion outlet uk
rolex watches
kate spade handbags
lululemon outlet
coach outlet online
michael kors uk outlet
michael kors uk
replica watches
rolex watches for sale
michael kors handbags
celine outlet
true religion uk outlet

10:22 PM  
Blogger حسام داود said...

level تسليك مجارى بالرياض
افضل شركة تنظيف بالرياض
تنظيف شقق بالرياض
تنظيف منازل بالرياض
شركة غسيل خزنات بالرياض
افضل شركة مكافحة حشرات بالرياض
رش مبيدات بالرياض
شركة تخزين عفش بالرياض
تنظيف مجالس بالرياض
تنظيف فلل بالرياض

2:50 AM  
Blogger xjd7410@gmail.com said...

This comment has been removed by the author.

1:08 AM  
Blogger xjd7410@gmail.com said...

coach factory outlet
ray ban sunglasses
ralph lauren polo outlet
cheap nfl jerseys
lebron james shoes
ray ban sunglasses
adidas ultra boost
jordans for sale
pandora jewelry
kevin durant shoes 8
fitflops sale clearance
louis vuitton outlet
jordan 8s
louis vuitton handbags
coach outlet store online clearances
ray ban outlet
nike air force
louis vuitton outlet stores
tiffany outlet
coach outlet store online
jordan 3 infrared
fake watches
vans shoes
adidas trainers
nike air max
nike air max 90
nike free run
nike roshe run
louis vuitton outlet
michael kors handbags
coach outlet store online
jordan 4
louis vuitton outlet
rolex submariner
louis vuitton outlet
adidas nmd
cheap oakley sunglasses
celine outlet
marc jacobs
michael kors outlet online sale
2016.7.16haungqin

1:20 AM  
Blogger ksaalrawda said...


طرق كشف تسربات المياه بالرياض

طرق الكشف عن تسربات المياه التقليدية من الطرق السيئة التى تحتاج الى الكسر والتبليط وتحتاج الى الكثير من الوقت والجهد والاموال لذلك قررت شركتنا ان تعتمد على افضل الالات والاجهزة المميزة التى تساعد فى التعرف على مكان التسرب من خلال افضل الاجهزة فيقوم العاملين بالتحرك بالجهاز المميز والتى يساعد فى التعرف على مكان التسرب فى اقل وقت ممكن فالجهاز يصدر ذبذبات يساعد فى القيام بالتعرف على مكان التسرب
تعد شركة الاول افضل شركة كشف تسربات المياه بالاحساء
- شركة كشف تسربات المياه بالقطيف - و افضل شركة كشف تسربات المياه بالدمام - وافضل شركة كشف تسربات المياه بالجبيل - و افضل شركة كشف تسربات المياه بالرياض
افضل شركة نظافة بالرياض - و شركة كشف تسربات المياه بالمدينة المنورة

واسعارها في متناول الجميع ومن الهام التاكد دائما من خلو منزلك من تسربات المياه حتى لا تتعرض لمشاكل مثل انهيار وتصدع المبانى الاول افضل شركة كشف تسربات المياه بالرياض تستخدم اجهزه الكترونية اكشف التسرب بالذبذبات وتغطى كافة مناطق الرياض فهى افضل شركة كشف تسربات المياه شرق الرياض

___________

كشف تسربات المياه بالاحساء - - و افضل كشف تسربات المياه بالدمام - وافضل كشف تسربات المياه بالجبيل
- و افضل كشف تسربات المياه بالرياض
- و كشف تسربات المياه بالمدينة المنورة

كشف تسربات المياه بالرياض
نوفر افضل اجهزة كشف تسربات المياه وبدقة عاليه يتم تحديد مكان التسرب واصلاح السبب بدون تخريب


5:13 AM  

Post a Comment

<< Home