Células-tronco são células não especializadas que têm potencial de diferenciação, ou seja, em condições favoráveis, são capazes de gerar células especializadas e de diferentes tecidos.

Para que essa diferenciação ocorra, as células-tronco têm de alterar necessariamente o seguinte padrão do seu metabolismo: 

Qual é o valor da expressão 2 3 + 10 2 +  ?

Look at the picture and answer the questions.

Write complete sentences.

A) Who has fruit for snack?

B) Who is having a salad?

Facebook Song lyrics

I wouldn’t call myself a social butterfly

And there’s not much that separates me from the other guy

But when I log in I begin to live

There’s an online world where I am king

Of a little website dedicated to me

With pictures of me and a list of my friends

And an unofficial record of the groups that I’m in

Before the internet, friendship was so tough

You actually had to be in people’s presence and stuff

Who would have thought that with a point and a click

I could know that Hope Floats is your favorite flick

Facebook

I’m hooked on Facebook

I used to meet girls hanging out at the mall

Now I just wait for them to write on my wall

Oh! Link’s status changed, it says he’s playing the recorder...

How do you know this person?

Did you hook up with this person?

Do you need to request confirmation?

Or did you just think they looked cute...

From their picture on Facebook?

If the internet crashed all across the land

Or my Facebook account was deleted by the man

I’d carry around a picture of my face

And a summary of me typed out on a page

Adaptado de http://www.lyricsmode.com/lyrics/r/rhett_and_link/facebook_song.html

the word tough can be replaced by

Texto base: A energia eólica é uma fonte de energia renovável. Hoje no Brasil já existem centros de geração de energia que utilizam a força do vento.  Leia:

Agora leia as frases sobre energia eólica e usinas eólicas e assinale a afirmativa verdadeira.