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Phenotype
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How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
Natural Selection acts on the?
On the individual, or on his genes.
What is the fundamental unit on which natural selection acts?
individual
Why does the environment act on natural selection?
I know of no government that acts, in any direct or significant way, on natural selection.
What does natural selection only act on?
It acts on populations.
What does natural selection directly work on?
Natural selection directly works on the heritable traits of organisms that impact their ability to survive and reproduce in a given environment. Organisms with traits that enhance their survival and reproductive success are more likely to pass those traits on to the next generation.
How does population change as a result of natural selection?
Natural selection is not a thing that acts on populations, it is a tendency for harmful genes to not be passed on (die out) and useful variations to thrive and become common.
Is a frog an example of natural selection?
No, a frog is not an example of natural selection itself. Natural selection is a mechanism for evolution that acts on populations of organisms over generations, influencing the traits that are passed on to the next generation. Individual organisms like a frog can be impacted by natural selection, depending on their traits and how those traits affect their survival and reproduction.
Natural selection acts on variation by?
Natural selection acts on variation by picking out from a population's gene pool those that are more fit to survive. More variation leads to more natural selection. For example, currently endangered cheetas are found out to have less genetic variation than other animals. As a result, if a disatrouous event occured, there are no genes that could help the cheetas survived. Thus, natural selection prevent the cheetas from reproducing as a population and they become extinct.
How do natural selection and sexual selection differ in their roles in shaping the evolution of species?
Natural selection and sexual selection are both mechanisms of evolution, but they differ in how they shape species. Natural selection acts on traits that affect an organism's survival and ability to reproduce in its environment, leading to adaptations that increase survival and reproduction. Sexual selection, on the other hand, acts on traits that affect an organism's ability to attract mates and reproduce, leading to the development of traits that enhance mating success. In summary, natural selection primarily influences survival and reproductive success in the environment, while sexual selection primarily influences mating success and reproductive opportunities.
Why does natural selection not directly affect genes?
Natural selection acts on the way organisms interact with one another and with their environment. The genes of organisms are not usually themselves involved in this interaction: they direct it through intermediaries such as proteins. So natural selection must work through these intermediaries to affect genes.
Does Natural Selection operate directly on the genotype?
Natural selection acts on the phenotype, which is influenced by the genotype. Favorable genetic traits increase an organism's chances of survival and reproduction, leading to their greater representation in future generations.
