This post is in spanish language instead of english. All the same, I’ve decided to make it short and simple which I’ve included some basic links for further explanation.     

Los Siluros fueron una poderosa y belicosa tribu que habitó en la isla de Britania, y ocuparon aproximadamente los territorios de Monmouthshire, Breconshire y Glamorganshire.

La calidad de las aguas de un río se puede medir por las especies que viven en él. Según este criterio, el Ebro a su paso por Zaragoza no saldría bien parado, al menos por lo que deja a la vista estos días: siluros que comen palomas.

“Los siluros son de esas especies oportunistas a las que no les importa comer basura y desperdicios. Son ratas de río”, explica José Antonio Domínguez, miembro del grupo ecologista Triacanthos. “Mucha gente lo ve como un espectáculo pero en realidad es un grave problema porque es una especie exótica que acaba con las autóctonas”, añade. De todas formas, no se muestra sosprendido, pues recuerda que se insistitó hasta la saciedad que una alteración sobre el río como la del azud traería problemas de este tipo.

Hope you like it.


Angela and Ruth, that’s really a good work you’ve done about the task. I’m very sorry to have completly forgotten about it, and thanks Angela for reminding me. Below is a pile of videos I found during my research.

with these videos i think what Ruth and Angela explained will be very clear.


Today in class,we talked about “genetics” which we also mentioned a brief  history of Gregor Mendel. He’s considered the father of genetics.His experiments with pea plants and later mice established the basic principles of heridity.What motivated him to conduct these experiments? According to Mendal it was “for the fun of the thing.”   

What really confused me was the different examples we did with flowers,which we mentioned cross-pollination and self-pollination.Now a Pollination is the transfer of pollen from the anther to the stigma of a fower.

Below is a labled structure of a flower.



Hello Everybody,in class Sir.David mentioned what “Mendal” used to pollinate or fertilised the plants without the agents of pollination.Can anybody tell me what it was.

If  i’m wrong about my quetion just tell me. Also the last picture below shows a table-like or tells a way of  how Mendal  did his experiments.i hope you like it

Albert A.

Gene, is the basic unit of heridity in living organism as it’s on the link.Resulted to the portion of DNA that contains both “coding” sequences that determine what the gene does, and “non-coding” sequences that determine when the gene is active (expressed).

Yes! That’s true but my question was,does the Ribosomes produce “its” own source of natural protein or does it reuse the protein we get from our diet,and as we all know,the end product of protein is “Amino Acid which is after digestion of the protein diet.

 I’ve found out that these ribosomes make proteins but the whole idea is,they are protein constructors,which does its work by synthesizing proteins.They do so with the result of what they have.

Sir,sorry for the interruption in class,the reason was i didn’t really understand it but  now I do.

i hope everyone reads it,and please don’t hesitate to add comments if you come accros any spelling mistake.


Albert A.                             


  • Just trying.




In biology, meiosis is a form of cell reproduction. It’s a divisional process cellular, In which a cell diploid  experience two successive cell divisions, with the ability to generate four cells haploid.