Speciation

[@AmoebaSisters]

We like to pin clarifications or corrections on our videos. We appreciate comments that bring them to our attention. There is a text box in this video that states that natural selection acts on populations, but we want to clarify this. Natural selection is based on differential reproductive success of individuals and this is a mechanism for evolution, which acts on populations, in order for this to happen. Natural selection does *occur* in populations (some references will use the words "*act on*" such as this example esajournals.onlinelibrary.wiley.com/doi/full/10.1890/0012-9623-95.2.24), but as a mechanism, natural selection does so by differential reproductive success of individuals. Our focus is to prevent the misconception that it does *not* produce an evolutionary change within the individual. The individual's survival and reproductive fitness will affect the population. Since we can't easily edit the text box, we are going to opt to remove the portion with the text box as it is explained without the textbox later in the video.

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we just covered this in class last think, your video was amazing, a two hour lesson summed up in 7 mins

[@loricalass4068]

Speciation does not support evolutonism as it is an example of stasis and stasis is the exact opposite of evolution. For ex. over 200,000 species of beetles are all still beetles. There are thousands upon thousands of species of birds, bees, lizards, trees, bacteria, trees, yeast, flowers, whatever. If a new species develops with any of those groups at all, you can bet your bottom science dollar that it will still be just a beetle, bee, bacteria, tree, fish, or whatever. We are supposed to fill in the blanks here with...faith...and think, "Well! If new species develops then things just keep evolving and evolving." But the next step above a species, in the Annimal or Plant Kingdom, is a Family. We aren't seeing any new Families forming. Anywhere. Ever. Accorrding to Darwin's so called Tree of Life and peer reviewed evolutionary literature, new Families have evolved. Over and over and over. However, nature operates today as it did in the past. In the real world, with trillions of life forms, we never see anything developing above the level of a new species. The life forms out there have purportedly had eons and eons of ancestors preceding them which should be showing at least one example of a part this Family "transitioning" to be another Family. But we only see that in the unverifiable, purely theoretical, realm of evolutionary literature, never in any life around us. If there is no evidence for transtiions from one Family to another - and please provide data if you know of any such evidence - then there is no evidence for evolution. But that's just for starters. If you want to take a walk on the wild side and look outside the box, you may find it interesting to see some of my other posts here.

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as always, succinctly and simply illustrated, fun to watch, and educational. thanks for making this.

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love how moo sorta hangs out in lots of the scenes of the video. thanks for helping me with science every day

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Are tortoise and turtles an example of habitat isolation?

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me :)

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[@petersteckle2095]

Loved it. What a great summation of speciation.

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Such a great video!!! Definitely going to use it in my classes.

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Another interesting video I’ve watched. I’ve had to watch so many interesting videos for my class. I’m enjoying these kind of videos so much. 😁

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I saw a docu series recently and in one episode they talked about a Tigon (Tiger Lion Hybrid) and how Lions usually have a gene which causes them to grow abnormally large physically ( found in the father's karyotype) but the mothers have a gene that prevents this.But when a Tigon is born its Abnormally large from a lion and a tiger due to the overgrowth gene, which doesn't allow it to live long. I think its the best example of the 2nd Postzygotic barrier you guys mentioned

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I find it surprising that the Amoeba Sisters will create a video about the same topic that I am currently learning in class... within the same week. I think the same thing happened in the Natural Selection video. It really helps to reinforce the material. Thanks for making these videos! Keep up with the coincidental uploads!

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The one video that clearly explained sympatric speciation 😭

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Loved the video and always staying curious 😎

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Going back to in person school this week!

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At 2:49, The foxes in the background on the right disappear lol. (might want to go to 2:48 instead so you can see them before they disappear.)

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it is really beautifully explained. tq very much. but mam i have one doubt that is, what will the phenomenon be called, when one vegetation completely takeover other vegetation. example: pine trees taken over by quercus species

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What so are they actually sisters or is just one person cause their voice never changes

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i love the intro music...

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i learn more here than in my science class

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0:20 Dragon Ball Z reference, I can only think of that now.

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Pls make a video on Hardy Weinberg principle

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Thank you.... lol I was not getting it reading my text book.

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This is such a cute informative video. Loved it!

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is it good that i have watched both natural selection and classification before i watched this?

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Please make molecular biology video!!

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