The cause of natural selection is a change in the environment of a species. This change can have many causes. E.g. climate change, introduction of a new species, flooding, etc. When such an environmental change occurs, the individuals which are the most fit will have the biggest probability to survive and change the relative gene frequency in a species' genetic pool.
competition. The competitions over land and food, the animal who is weaker dies out. "survival of the fittest" Charles Darwin
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Life.
limited food -APEX
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
When nothing happens to exert strong population pressure on that population, natural selection favors the allele frequency already present. When mutations cause new traits, natural selection weeds these traits out because they're not as efficient as the others.
Everything from available food to climate will cause the changes we see in natural selection. Random mutations occur constantly and when those mutations are beneficial for life, the genetic code is more likely to be passed on to future generations.
Adaptation does not allow for natural selection: natural selection causes adaptation.
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
No, natural selection is believed to result in evolution.
Natural selection is one force that can lead to evolution.natural selection is one cause of evolution
No, they are two different things.
No, it's exactly the other way around: natural selection causes adaptation.
Natural selection.
mutation
Yes, natural selection causes evolution, which results in the variety of life on earth.
Natural selection can help creatures adapt to their enviorment. Sometimes this can cause unwanted problems.
no
natural selection
They aren't. Intelligent design posits that natural selection cannot create life as we know it, and inserts a deity as the cause.
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.