Species or individuals capable of adaptation live to reproduce. The ones incapable of adapting, do not propagate their genes.
Yes, adaptation is a key component of natural selection. Organisms that are better adapted to their environment are more likely to survive and reproduce, passing on their advantageous traits to future generations. Over time, this process leads to the evolution of populations with characteristics that enhance their fitness in specific habitats.
All modern lifeforms are examples of natural selection, since they are all the result of it.
It is meant to indicate the Darwinian model for evolution, as opposed to for instance the Lamarckian model. It would be true that evolution occurs and has occurred even without Darwin; but until Darwin, various explanations would have been possible for why and how it happens. Darwin first formulated the thesis that evolution is directed by differential reproductive success.
In many ways. For one thing, evolution and natural selection are mindless processes; they act without regard for the rights to happiness or life of the individual. On the other hand, human civilization has throughout history tried as much as possible to move away from blind forces of nature like natural selection, and as a result, human populations now may harbour many genes that would, under less civilized circumstances, have detrimental effects on human survival chances.
Acquired characteristics acquired during an organism's lifetime cannot be passed on to offspring according to modern evolutionary theory. Evolution is driven by genetic variations that are inherited and can lead to changes in a population over time through natural selection.
No, natural selection is believed to result in evolution.
Natural selection.
Natural selection.
Natural selection.
Natural selection is only the result of changing environments, mutation and the variation resulting therein. Natural selection is the process of adaptive change and the main mechanism of evolution that leads to speciation. Natural selection is a process as mutation and variation are grist to the mill of natural selection.
increased biodiversity and as a result faster and more effective natural selection and hence evolution.
All natural selection results in evolution. But natural selection is not necessarily the only mechanism leading to evolution. There are processes at work on a molecular level, such as intragenomic conflict-type processes, that also result in differential reproductive success, but aren't exactly related to the kind of processes Darwin first described.
The brain is the result of the evolution through natural selection over many millions of years.
Natural selection is the type of selection that can result in a branching evolutionary tree if it goes on long enough. This is because organisms may eventually evolve into a distinct species.
Evolution
Evolution through natural selection occurs slowly over millions of years. It has been hypothesized that evolution is the result of positive mutations that occur in a community of organisms that help them survive better. Evolution is essentially descent with modification.
Natural selection is the gradual, non-random process by which individuals with a different trait or traits are more reproductively successful than others. This relies on variation existing in the population. Natural selection results in traits becoming more or less common in the population based on the success of those with the trait(s). Natural selection is the main mechanism for evolution. Favourable traits make it more likely for these animals to survive and pass on their genes. This means that over time, more of the population will have these genetics. This can result in species which specialize - and may become a new species. This is how natural selection relates to evolution.