So here we have an example problem that asks, which of the following factors would not impact a species' ability to expand its range during dispersal? And we've got these four potential answer options down below. Now, of course, recall from our last lesson video that dispersal refers to the movement of individuals or their gametes from their birthplace to other new locations where they could potentially establish a new population and expand the range of the species. Taking a look at answer option A here, it says competition for resources with other species. Now, competition is going to make it more challenging to establish yourself in a new area.
Competition certainly is a factor that would impact the dispersal of a species. But again, we're looking for the answer that would not impact a species' dispersal. So for that reason, we can eliminate answer option A. Now moving on, option B says, the availability of suitable conditions for survival. And, again, the conditions in the environment are going to have an impact on the dispersal of a species.
If the conditions of the environment are not suitable, then the species will not be able to disperse into that area. And so once again, we're looking for the factor that is not going to have an impact on species dispersal, so we can eliminate answer option B because this would have an impact on species dispersal. So now we're between either option C or option D. Notice answer option C says, genetic diversity within a population of that species, and option D says, geographic barriers such as mountains or oceans. For sure, geographic barriers such as mountains or oceans can certainly prevent the dispersal of some species.
Because option D is a factor that would or could impact species dispersal, we can eliminate answer option D, because again, we're looking for the one that would not have an impact on species dispersal. This leaves answer option C, which is going to be the correct answer here, which says, genetic diversity within a population of that species. Genetic diversity is going to exist within every population, and so genetic diversity within a population is not necessarily going to prevent the dispersal of that species, because even with species that are capable of dispersal, there will be some genetic diversity within their population. Option C is going to be the correct answer to this example problem. That concludes this example, and I'll see you all in our next video.
