How Algae Changed the World

How Algae Changed the WorldThis is the story of how algae changed the world.

Without algae, human life would not have flourished. Algae, is the building block of human life.

Let me explain.

Chlamydomonas reinhardtii, or Chlamy for short,

Genes carry the instructions of life “written” on tightly coiled molecules called DNA inside every cell. Chlamy’s genetic “instruction book” has about 15,000 genes, which is about 8,000 fewer genes than in humans. When the biologists compared Chlamy’s genes to other organisms, some interesting trends emerged.

A large number of Chlamy’s genes can also be found in flowering plants. But it might be surprising to know that roughly 35 percent of Chlamy’s genes can be found in both flowering plants and humans, the research team reported earlier this year. Plus, about 10 percent of Chlamy’s genes can be found in human cells but not plant cells.

No one is going to invite Chlamy to the family reunion, of course. And Chlamy isn’t that unusual — many different living things have identical genes. But Chlamy is interesting: It shows how evolution can deliver some surprising tricks, like producing algae that is genetically similar to humans and plants.

Bacteria move in

About 3 billion years ago, Earth was a different planet. It was not populated by people, animals or plants, and the atmosphere was mostly carbon dioxide. Earth’s inhabitants were microorganisms such as bacteria, so small they’re impossible to see without the help of a microscope.

So how did that Earth become the planet on which we live? Many scientists who study evolution blame one particular organism called cyanobacteria. (Sometimes known as blue-green algae or blue-green bacteria, these microorganisms were grouped together with algae until just a few years ago.)

Blue-green bacteria changed the world more than any other group of organisms,” says Brent Mishler, a phycologist at the University of California, Berkeley. Blue-green bacteria were capable of photosynthesis, he says, which means they started taking carbon dioxide and adding oxygen to the atmosphere.

And one time, when this algal ancestor ate one of these blue-green bacteria, something strange happened. The organism didn’t digest the bacteria — it absorbed it.How Algae Changed the World

Instead of becoming dinner, that bacteria became a permanent resident inside the other organism. Biologists believe that bacteria-inside-an-organism is the oldest ancestor of all green algae. These two organisms each had their own set of genes, but after millions of years and many, many, many generations, the genes mixed and both sets became essential for the alga’s survival. The two organisms had become a single organism.

Other types — including brown algae, red algae and diatoms — also evolved in a similar way. “What makes all the algae groups algae is that some of the cyanobacteria went and lived inside them,” Mishler says. “But they were invaded separately.”

This distinction explains why there are so many different kinds of algae — and why the algae family is still hard to pin down. Scientists have shown that many different types of algae are related only distantly, despite the fact that they may look similar.

We, as a species, have literally evolved from algae.










"How Algae Changed the World" Free Report!
Enter your name and email below for instant access to your free report...

Leave A Reply (No comments So Far)


9 + = 13

No comments yet

algae-order-now-NB1 

 

 

 

 

 

 

 

Algae Biorefineries and Micro Farms

 algae-order-now-NB1

  A4E-order-now-noBG1

  A4E-order-nowNB

  OPbookcoverNB2-ordernow

 order-nowNB