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A hypothetical universe in which natural selection did not occur would
- harbour no life, hence nothing for natural selection to act on, or
- be different from the reality we know to such a degree that no meaningful statements can be made about it using terms applying to this reality.
But, as an exercise of the mind, we'll consider just one possible (well, impossible, in our reality) scenario: think of an organism that replicates perfectly. It does not produce variation of any kind. Each offspring is an exact copy of the parent. Such a population, in a universe where such an organisms could exist, could grow, leading to an expanding population of exact replicas. Doesn't sound very exciting, does it?
Okay, let's consider a second scenario, just for the heck of it. Think of a population of organisms replicating with variation, but where each variant (somehow, through strange perversions of known laws of physics) has the exact same chance of obtaining food and replicating. This might result in an expanding population with much genetic diversity, but each variant would be equally represented in the population gene pool. There'd be no distinct species, just a fine gradation of morphologies spread throughout the ecology. An ecology that, as mentioned above, would have the (physically impossible) capacity of providing an unlimited amount of everything they need to each of those critters.
In other words, speculating about what life might look like without natural selection is interesting, but has no real applications, since such conditions could never occur in this universe.
What else can I help you with?
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
Is inheritance a requirement for natural selection?
Yes it does. Without variance in the organisms genome, that gives variance to the phenotype, there would be nothing for natural selection to select from.
Adaptation which allows for natural selection is called?
Adaptation does not allow for natural selection: natural selection causes adaptation.
How is natural selection used in artificial selection?
Natural variation in artificial selection is used because humans choose from among the naturally occurring variation s in species. Natural selection is related to species fitness because Darwin called natural selection survival of the fittest because those that could survive would carry their species on there for being the naturally selected.
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
Is descent with modification caused by natural selection?
No, it's the other way around: descent with modification is what you need for natural selection to happen.
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
Which is more likely to be true natural selection or evolution?
Evolution, of course. Evolution can happen without natural selection in some cases; drift, flow. Generally though, natural selection causes evolution and then, by definition, would come first.
What happen to an individual that is poorly suited to its environment?
They die. This is called Natural Selection.
What kind of natural Selection would eliminate one extreme?
Directional selection
Why is genetic variation important for natural selection to drive evolution?
Genetic variation is important for natural selection to drive evolution because it provides the raw material for natural selection to act upon. Without genetic variation, there would be no diversity in traits for natural selection to favor or eliminate, and evolution would not be possible.
What is the name for the process in which the organisms best adapted to their environment survive?
Its NaTuRaL sElEcTiOn if you didn't know.
What effect would natural selection have on a partially evolved bat?
it would die
What type of selection is taking place on Wallace Island?
In Darwin's time, it would be classified as "natural" selection.
Is dog breeding an example of natural selection?
False, dog breeding would be an example of Artificial Selection.
Is Dog breeding is an example of natural selection?
False, dog breeding would be an example of Artificial Selection.
Is inheritance a requirement for natural selection?
Yes it does. Without variance in the organisms genome, that gives variance to the phenotype, there would be nothing for natural selection to select from.
