Schlagwort: evolution
Afrikas Savannen sind 10 Millionen Jahre älter – Weltweit ältester fossiler Nachweis für C4-Gräser erbracht
Wie Rochen gelernt haben, durchs Wasser zu gleiten
Evolution von Muskeln: gemeinsamer Ursprung bei Seeanemonen und Mensch
Blind Dating in der Bakterien-Evolution
Ein Forscherteam des Max-Planck-Instituts für terrestrische Mikrobiologie in Marburg und der Technischen Universität Berlin rekonstruierte längst ausgestorbene Proteine eines UV-Schutzsystems von Cyanobakterien. Das überraschende Ergebnis: die Proteine passten bereits perfekt zueinander, als sie aufeinandertrafen. Diese Entdeckung erweitert die bisherigen Kenntnisse zu den Spielregeln der Evolution.
Mikroplastik verändert Darmflora von Seevögeln Weniger vorteilhafte Bakterien, dafür mehr Krankheitserreger
Neue Augen bei Trilobiten entdeckt
How fishermen benefit from reversing evolution of cod
Was der Fischer davon hat, die Evolution des Kabeljaus zurückzudrehen
Insights into the evolution of the sense of fairness
Bryophytes branch differently… also at the molecular level
Largest amber-preserved flower
The vertebral column develops in the same way in modern animals as it did 300 million years ago
Rapid Evolution of Spermatogenesis
How cells gain control over their bacterial symbionts
Modern eukaryotic cells contain numerous so-called organelles, which once used to be independent bacteria. In order to understand how these bacteria were integrated into the cells in the course of evolution and how they are controlled, a research team from the Institute of Microbial Cell Biology at Heinrich Heine University Düsseldorf (HHU) has examined the single-celled flagellate Angomonas deanei, which contains a bacterium that was taken up relatively recently. In the journal Current Biology, the biologists now describe how certain proteins in the flagellate control the cell division process of the bacterium, among other things.
More flexible than we thought: Worms give us new insights into the evolution and diversification of TGF-ß signaling
Two-billion-year-old enzyme reconstructed – Detective work by molecular biologists and bioinformatics researchers
New personalized test for an earlier and more accurate prediction of cancer relapse
Systematically examining the way spatial structure influences the evolution of cancer
Mitochondria and the evolutionary roots of cancer
Cancer is a group of almost 200 diseases that involve variety of changes in cell structure, morphology, and physiology. Cancer phenotype is underlying several alterations in cellular dynamics with three most critical features, which includes self-sufficiency in growth signals and insensitivity to inhibitory signals, evasion of programmed cell death and limitless replicative potential with a potential for the invasion of other organs. Cancer disease is widespread among metazoans. Some properties of cancer cells such as uncontrolled cell proliferation, lack of apoptosis, hypoxia, fermentative metabolism and free cell motility, i.e. metastasis, resemble a prokaryotic lifestyle, which leads to the assumption of a reversal like evolution from eucariotic back to proteobacterial state. This phenotype matches the phenotype of the last universal common ancestor (LUCA) that resulted from the endosymbiosis between archaebacteria and α-proteobacteria, which later became the mitochondria.
Quantum Tunnelling to the Origin and Evolution of Life
Quantum tunnelling is a phenomenon which becomes relevant at the nanoscale and below. It is a paradox from the classical point of view as it enables elementary particles and atoms to permeate an energetic barrier without the need for sufficient energy to overcome it. Tunnelling is being of vital importance for life: physical and chemical processes can be traced directly back to the effects of quantum tunnelling. These processes include the prebiotic chemistry as well as the function of biomolecular nanomachines and has many highly important implications that can be derived from to the field of molecular, prebiotic chemistry and biological evolution, respectively.