VD - 9/03/2014

Chloroplast and mitochondria were free prokaryotes before their integration, by endosymbiosis, to current eukaryote cells. Inside them contained a single circular chromosome, reduced size, and ribosomes that allow to arrange in sequence proteins to...

VD - 2/03/2014

Mitochondria are cellular organelles able to reproduce, this fact, as chloroplast, are an indication of its existence as free primitive cell.

VD - 23/02/2014

In the previous chapter it was determined that the current chloroplasts (as endosymbiotic organelles of eukaryotic cells) have their origin in free prokaryotes possess DNA, ribosomes and double membrane. Therefore the question is about the origin of...

VD - 16/02/2014

Among the sedimentary rocks with an age of 3.100 million years can be found stratum that correspond to marine precipitation of iron oxide.

VD - 2/02/2014

If we observe the development of any embryo we will see an accelerated film evolution of life, starting with a single cell, continues with the association of several undifferentiated cells, before moving on to the stage of differentiation and its...

VD - 26/01/2014

Recent advances in the use of pluripotent cells allow try growing organs for later transplantation to the donor's own cells.