with the consequent concern of the sailors. Multiple aspects. In the first place, It serves as a camouflage for defense against predators, As we observe in the skin of the chameleon or in the expulsion of ink from the cephalopods. It is a mechanism, secondly, of recognition and sexual attraction,…
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Treatment of diseases using cell cultures
Biologists investigating basic problems feel fulfilled when their investigations lead to practical application. On August 3, 1492, Christopher Columbus left the port of Palos for the Canary Islands, to begin, on September 6, the crossing of the ocean sea. When leaving La Gomera. Wounds produced by burns. This line of…
Continue Reading....The common definition of a biological species does not apply to viruses
Greek mythology tells that when the curious Pandora opened a forbidden box, All evils and miseries spread throughout the world. Among those calamities were, A word that in Latin means slime, Poison and stench. Viruses cause many diseases, From the common cold to AIDS, Or acquired immune deficiency syndrome, Perhaps…
Continue Reading....Frederick Sanger: The Discovery of the Hidden Sequence
One might expect a two Nobel Prize winner to raise funds for a world-renowned laboratory, lecture devoted admirers, Collect royalties for a bestselling novel, And thus spend his days. But Frederick Sanger does not seek fame or fortune. The man who laid the foundation for modern biochemistry lives a peaceful.…
Continue Reading....Telomere length decreases with the number of cell divisions
When a cell moves between tissues, Part of the liquid mass of its cytoplasm becomes rigid. This transformation depends on the orderly assembly and disassembly of the protein scaffolds of its cytoplasm. Among the first cells to pass through the slide of an optical microscope are protozoa. And yet that…
Continue Reading....The origin of eukaryotic cells
Animals, Plants and fungi owe their existence to a transformation by virtue of which tiny and elemental bacteria became large cells endowed with a complex organization. Christian de About 3.7 billion years ago the first living beings appeared on Earth. They were small, Single-celled microorganisms, Not very different from today’s…
Continue Reading....Control of apoptosis in mammals death regulatory genes
The disappearance of growth factors and some hormones causes cell suicide; This is the case of interleukin for T lymphocytes, Antigen for B lymphocytes, Interleukin nerve growth factor for neurons, Or platelet-derived growth factor for cells. glia cells. Control apoptosis mammals Similarly, The disappearance of steroid hormones leads to the…
Continue Reading....Lethal cycles and Swiss army knives
Cytochrome c leaves its usual place in the mitochondria and takes up residence in the cytosol, It seems that every living being, lives for a period of time that allows it to transmit life. It is clear that there are certain elements within the apoptosis regulatory hierarchy Lethal cycles that…
Continue Reading....The cells of our body contain surprising internal communication networks
Anyone who knows the game of “Telephone” knows perfectly that when passing the message from one person to another, The words gradually degrade and end up being unrecognizable. That the molecules inside our cells, Which are constantly making their own version of the telephone, Do so without missing an iota…
Continue Reading....Exit from mitosis CDK inactivation and genome replication
The technical name for these molecular cutting rooms, Play a decisive role in the pathways that regulate a whole sheaf of cellular processes. The method Quantum physics rewrites causality The economics of new technologies. On the repetition of a hexagonal unit, The which contains a fixed number of photoreceptor and…
Continue Reading....Unicellular parasitoids. An epidemic that kills krill in the Pacific Northwest
Form one of the most ubiquitous and surprising groups of organisms in the biosphere. Their physiological and biochemical diversity and versatility, their genetic plasticity and their ability to colonize all kinds of environments, both in their free and symbiotic, saprophytic or parasitic forms of life, Make them a very unique…
Continue Reading....The neurons of the brain are covered with spines and filopodia
After the turn of the millennium, Which marked the end of the decade of the brain. It is reasonable to ask ourselves about the great challenges pending in the 21st century. Aells the story of Thomas Harvey, a pathologist who, in 1955, Performed an autopsy on Albert Einstein. who studied…
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