True or false? Speciation is a slow process. Justify your answer.

Video transcript

Welcome back. Here's our next problem identify which of the following is key to speciation. Well we recall for a content video that speciation is when two groups Or two or more groups of an organism diverge from each other enough where they get to the point that they can no longer interbreed. So they've become genetically different enough from each other that they can no longer meet with each other and produce fertile offspring. So we're looking at these four choices side which is the key to speciation. A group. Two groups diverging enough from each other. That this is the case. So let's look at our answer choices. Choice A. Is reproduction. Um Well that wouldn't necessarily drive speciation, reproduction just reproduces the species so we can keep on reproducing forever and remaining the same species. So that's not our answer choice here. Choice B says reproductive isolation while reproductive isolation would be a separation of two groups so that they can no longer exchange genes. Well this is key to speciation because as long as two groups, even if they develop differences or different traits, if they can keep mating with each other and exchanging those different alleles um They won't become different species. Um Those traits might be expressed in different frequencies in the group. Um But they can still exchange and have um jeans exchange between them. But if they can no longer exchange genes, mutations are going to arise. They're going to be subject to natural selection. Those differences in the genome. We're going to accumulate to the point where they can no longer um mate with each other no longer successfully reproduced together and then become two different species. So reproductive isolation is key to speciation in whatever manner that occurs. So, choice C says population explosion. Well, that would just be a sudden growth in the numbers of a population. That's not going to be key to speciation because you would keep on being the same species just in larger numbers. And choice de extinction extinction is obviously the loss of species. So that's not going to be our answer here. So again, Which is the following is key to speciation. Choice B reproductive isolation. See you in the next video.