Por qué es importante estos elementos — - azufre: fundamental para la estructura de las proteínas, se libera a la atmosfera cuando hay quema de combustible fósil -fósforo: esencial para que se forme nuestro material genético

Ciclos biogeoquímicos cuáles son los elementos comunes en la tierra y comunes en las moléculas orgánicas

Qué son los procesos biogeoquímicos

En dónde se almacenan estos elementos

Procesos geológicos que favorecen al ciclo biogeoquímico

Por qué son importantes estos elementos

Qué ocurre en los ciclos químicos

That which is everybody's business is nobody's business.

What we do and say and show really matters.

The armored vehicle manufacturing base is not a light switch that can be turned on and off at will. If we mothball production of systems like the Abrams tank, it will take time and money to get this capability back.

Now, I'm a failed political consultant. But sometimes fiction has a way of capturing people's imagination in a way that non-fiction doesn't. Conservatives typically haven't written much fiction - specifically political thrillers - over the years to educate, inspire and mobilize people on issues of great import, but we ought to.

To apply for a gifted program, children as young as 4 are required to sit through hour-long verbal exams.

The more you care, the stronger you can be.

Nobody played instruments in my family. My father got that bug and said he wants his son to play saxophone.

When there is breakdown in a relationship you must have the hard conversation. It may not be pretty and it may not feel good. But if you are willing to listen and tell the truth it will open up.

I can't wait to have kids. I want so many. I want to adopt and have my own.

We are in a double bind. We are expected to feel inferior not only as women but because we are old.

The desire to become a journalist came really because I very much like living abroad, and like to travel, and wanted to be paid for it.

There are a lot of ways to make a positive impact on the community without necessarily being a politician.

It may be that the seemingly intrinsic attraction that past time has for me is merely a desire for escapism, as I look out at the nation and world with little optimism.

If you wanna know how not secure you are, just take a look around. Nothing's secure. Nothing's safe. I don't hate technology, I don't hate hackers, because that's just what comes with it, without those hackers we wouldn't solve the problems we need to solve, especially security.

Some companies are worth paying for up front.

Ballet pumps are the dream shoes because they are so comfortable. They look great both with jeans and summer dresses; and you can even wear the right pair with an evening gown.

I am a stickler for always having to know what time it is.

We weren't radical chic. Jane Fonda embarrassed me. We belonged to no political parties. Basically, we were vaudevillians.

You are the only Bible some unbelievers will ever read.

There have been many, many paintings of Theseus and the Minotaur, as it is one of the more popular myths, so how could I make mine different and new? I decided it would be best to make the most dynamic painting I could. I wanted to capture the moment right before the Minotaur's horn was snapped.

Wyoming is a special place: Where our farmers and ranchers rise before dawn and work until night to feed our nation. Where our coal miners and oil field workers produce the energy that powers America's homes and businesses, and where our families are guided by faith, know the value of hard work, and deeply love our land.

In the broad sense, as a processing of everything one hears or witnesses, all fiction is autobiographical - imagination ground through the mill of memory. It's impossible to separate the two ingredients.

I do not see how the Japanese can hold out against this united front.

The common facts of today are the products of yesterday’s research.