A group of finches live on a small, isolate island. One day, a few finches travel to a distant island and start a new population of finches. This type of change in a population is called what?

Okay. So this question says, a group of finches or a group of these little tiny birds live on a small island. And then one day, a few of them travel to a very distant island and start a new population of finches. What is this type of change in a population? What is this called? Speciation, founder effect, bottleneck effect, or genetic drift. So speciation is actually the creation of a new species. Right? But this isn't what this says. It says that we had some finches, some of them flew to a different island, and now there's a new population of finches. Maybe, eventually, one day they'll become a different species, but that's not what is talked about here. So a can't be it. We have founder effect and founder is when a founder from one population starts a new population in a different place. So this is looking very likely. Bottleneck is when you have a big population and something happens and that population becomes very small, limiting the genetic diversity, which doesn't sound like this. The population at a finch on the first island is the same population even if a few of them blew away. C doesn't make sense. And genetic drift has nothing to do with genes or organisms moving from one place to another. It just has to do with the, sort of, random, ability of alleles to get passed on to offspring. So, d, isn't the answer. So the answer to this question is b, founder effect. With that, let's move on.

A group of finches live on a small, isolate island. One day, a fe...

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A group of finches live on a small, isolate island. One day, a few finches travel to a distant island and start a new population of finches. This type of change in a population is called what?