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Darwin claimed it was the process of natural selection that drove evolution. However this is incomplete, without both a process that creates variation and the process of natural selection evolution could not work. There are many processes that create variation (e.g. mutation, crossover, transformation, infection, conjugation, polyploidy).
The sun/solar energy is the driving force behind the water cycle.
Evolution has two key driving forces without which it would not occur, but with which it must occur: The first is reproductive variation: this basically asserts that each organism is slightly different from both its parents and its siblings. The second is differential reproductive success: this asserts that features that allow their bearers to reproduce more successfully than members of the same species with different features are likely to be present in a greater part of the population in coming generations. In other words: the key driving forces behind evolution are variation and selection.
The driving force is explained by two factors: voltage gradient and concentration gradient. When there are more ions inside of a cell than outside of a cell, the concentration gradient is pushing the ion to exit the cell. This is simple diffusion. If that ion carries a negative charge then it also wants to exit the cell because the outside environment is slightly more positive.So if you add both voltage gradient and concentration gradient you get the driving force. In the example above both gradients are pushing the ion outside of the cell. Sometimes you can have the gradients going in opposites and then the driving force will be determined on which gradient is stronger.
the Na/ K pump
Natural Selection
adaptation and natural selection
The advent of the T-1 carrier as the preferred transmission medium was the principle force driving the evolution of the PBX
Reproductive variation is central to evolution. All else in evolutionary theory follows directly or indirectly from the fact that organisms reproduce with variation.
To Darwin, the central concept of organic evolution was natural selection. He proposed that individuals with advantageous traits are more likely to survive and reproduce, passing those traits on to their offspring, leading to changes in the characteristics of a population over time.
Natural selection is the process of certain animals being more successful than others and thus reproducing more. It is the driving force behind evolution as we currently understand it.
Charles Darwin Published "On the origin of species by means of natural selection" in 1859. He was not the first to postulate evolution. His grandfather Erasmus Darwin advanced the theory of evolution 75 years earlier. Charles Darwin gave us the driving force "natural selection"
the driving force for erosion is , when bad things come out of driving that involves erosion.
Competition would be the driving force of exclusion
The Amiot 143 of the French Air Force represented an evolution in the Amiot piston-engine.
As one Nobel prize said, "The problem with evolution is that everyone thinks they understand it." Probably the main reason that evolution is difficult to understand is that it requires the acceptance of "deep time" - extremely long periods of time. Another thing that is difficult to grasp is that evolution isn't about "survival of species"; most evolutionary biologists consider the survival of genes and the driving force of evolution.
Darwin claimed it was the process of natural selection that drove evolution. However this is incomplete, without both a process that creates variation and the process of natural selection evolution could not work. There are many processes that create variation (e.g. mutation, crossover, transformation, infection, conjugation, polyploidy).