Since the modern synthesis, the technical definition of evolution...

Question

Since the modern synthesis, the technical definition of evolution is a change in                    in a                    over the course of generations.
a. traits, species;
b, allele frequency, population;
c. natural selection, natural environment;
d. adaptations, single organism;
e. fitness, population

Accepted Answer

Hi everyone here's our next question. Evolution is the process of blank change in species blank characteristics that takes place over many generations. Well let's look at filling in that first blank um The process of what kind of change we have kind of hit right here in our problem because it says over many generations and our choices here are gradual sudden abrupt or advantageous. So if we're looking at over many generations we want to think about the word gradual slow change. So we when we look at our answer choices only choice A. Has gradual as that first choice. So that looks like our correct answer. If I wanna test I would pick that and move on. But here I want to be thorough So we'll just keep on going and look at our second blank space here. So evolution is a process of gradual change in species blank characteristics. Well what kind of characteristics are changing? We have a choice of physical or biological. Um Well a little characteristics doesn't make sense. Um So that's definitely not our answer there. We do have physical there. And choice C but of course it has abrupt change. And then um Choice D. Says advantageous and biological. Well these are kind of nebulous. You know? Maybe not. They're kind of odd choices of words. Um We might get confused by that. But again we want to hang on to that gradual as the first and then physical characteristics um are changing because it's those physical characteristics. It's physical that um convey advantages. So those are um those physical characteristics are adaptations that convey advantages And if an adaptation conveys an advantage, it leads to greater reproductive success. And that's what leads to that evolutionary change. Because those individuals with that physical adaptation that gives an advantage are more likely to pass on the gene for that physical characteristic. So evolution causes gradual change in a species physical characteristics as a result of the natural selection that selects for advantageous physical characteristics. So our answer here is choice a gradual change. Physical characteristics. See you in the next video.

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