Evolution/evolutionary process

In a simplified version of ISM, each site is considered only once (Figure 2.4). This means that, in the given case of four sites, 65 libraries of mutants are possible, the overall evolutionary process being convergent. Of course, not all branches have to be explored. Indeed, this embodiment of ISM has been shown to be highly successful in the rapid evolution of enantioselectivity [23,26,27] and thermostability [28]. 

The data in Figure 2.12 are the results of initial mutagenesis experiments, which does not yet constitute directed evolution. An evolutionary process was subsequently induced by combining the mutations of two improved mutants of the first round [46]. Thereby new mutants were obtained, which show an increase of activity relative to the WT by more than 2 orders of magnitude. Although enantioselectivity was not the... 

Three pieces of evidence are cited in support of an RNA World. Firstly, some 17 RNA ribozyme catalysts have been discovered that produce a diverse array of organic molecules, including peptide bond formation. Second, the ability to form the peptide bond and build proteins may lead to a complex evolution favoured by the proximity of proto-proteins, producing enhanced reaction efficiency. Finally, RNA is the intermediate in the biosynthesis of DNA, suggesting that it must have preceded DNA in the evolutionary process. 

Odors - as any other body features or social signals - are both product and agent of evolutionary processes. Are there extreme results of runaway evolution As such examples are not immediately accessible to our senses, we have yet to discover the olfactory equivalents of the bizarre Irish elk s antlers, the wings of the Argus pheasant, or the antics of the bowerbirds. 

Evolution of a signaling system can also be driven by preexisting sensory biases. The signaler adapts to the receiver s sensory abilities ( sensory drive Endler and MacLellan, 1988). In acoustic communication of frogs, such an evolutionary process has been termed sensory exploitation (Ryan etal., 1990). 

The MFCs for a species are coefficients for real trends of plant traits during the period studied. Numerically, it can have a value from 0.00 to 1.00 and can also be interpreted, if needed, as a percentage. The lower the MFC, the weaker the rate of micro-evolution for the period of time studied. A maximum value (1.00) for the MFC signifies that a micro-evolution (trait change) has occurred in all the plants studied and, therefore, macro-evolution has occurred in the population. In this case, the new hypothetical constant coefficient is valid (no trends, no mutations, no trajectories). The MFCs can be positive or negative. Positive MFCs show that the traits are developing in a micro-evolutionary process, and negative MFCs indicate the reverse. The MFCs represent very useful parameters for measurement of micro-evolution in plant species. 

The preceding invited paper by Sahade (1987) gave a balanced overall picture for the subject matter. I shall attempt to complement his talk in discussing two classes of atmospheric diagnostics of the evolutionary processes in interacting binary systems. These are (I) Abnormal abundances of elements in the atmosphere resulting from the nuclear processes in the stellar interior. (II) Mass flow as a consequence of the evolution of either of the components and the Algol type binaries. 

And now, when at the stage of the noosphere, which is a stage of the revolutionary reorganization of the whole process of the planetary development, the determining factor of evolution is human activity, we should realize that Mind becomes a participant of the evolutionary process, exactly the participant which with all its power follows the common laws. And under such conditions, considering all limits, barriers inherent to Nature, we have the right to speak about the directed development of the biosphere. ... 

We understand transition as a consecutive stage in an evolutionary process. The evolution of energy was made through clear stages dominated by different technological paradigms... 

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