The Making of the Fittest: Natural Selection and Adaptation
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- Опубликовано: 29 сен 2024
- This HHMI video shows living of the the rock pocket mouse as an a example of Darwin's process of natural selection. Not only is evolution happening right now everywhere around us, but adaptive changes can occur in a population with remarkable speed. This speed is essential if you're a desert mouse living in an environment where a volcanic eruption can reverse selective pressure in nearly an instant. The film features Dr. Michael Nachman, whose work in the field and in the lab has quantified the selective pressure of predators and identified the genes involved in adaptation. In a complete story, from ecosystem to molecules, pocket mice show us how random changes in the genome can take many paths to the same adaptation-a colored coat that hides them from predators.
Check out their other interesting films here: www.hhmi.org/bi...
Frequently asked questions about evolution: www.pbs.org/wgb...
Evolution: Fact and Theory: www.actionbiosc...
101 Reasons Why Evolution is True: ideonexus.com/2...
Evidence of Common Descent: en.wikipedia.or...
Evolution 101: evolution.berke...
8 examples of evolution in action: listverse.com/2...
15 Evolutionary Gems: www.nature.com/...
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Who else is here because of their ap bio class
im here because of my 10th grade science teacher.
Frank Pham meeeee from Curtis middle school
9th grade honors bio
I am 😂
therealMarine101 yeah same
Amazing video
oh, it wouldnt be so "hard" to guess what kind of bs they would throw at this. i can already hear them say " but it is still a mice!" or " this proves micro evolution on which we already 'agree' on, not macro evolution".
I HAVE DONE THE HOMEWORK PROFESSOR KAI!!!!
Who here because of corona break work? 😂
yessir
me
me
my school year is shut cause of corona
Same
I hate my bio class
Dude same. It's the only class I hate
he jus like me fr
same
I’m only here cuz my teacher🤚🏾😚
"these mice are the snickers bar of the desert" lmao
evolution is the cause of existence of life and sexual reproduction is the blessings for it. it is true that one day this will lead to a end of life and no falling of asteroid is needed for this.
😂😂😂
@@Graciuslife how this will lead to death
@@ww2battlecombat525 listen,day by day many dangerous mutation are taking place which r hazardous for man kind and the best example is novel Corona virus.This is probably due to mutation in some thing that it became such a vast problem.There is no guarantee that such type of things won't occur in future.We r alive BCG till date we r the fittest animals to survive.But if any other species will arrive with better adaptation quality then we will be no longer fittest.And if environment will not be in our favour we may extinct.Bcg every thing that has an origin has an end
@@Graciuslife bro what about intelligence
I like how random kids from school are posting in this and then nerds in replies are trying to reply to them with science.
Hello my fellow Ap bio kiddos
The husband after finding out that his wife had a black baby
same boat man same boat
here cuz of an assignment in biology
supernova49 did you actually watch the video? It's all about a mutation that proves to be beneficial!
Lots of mice were harmed in the making of this video.
Mr.Bauser class anyone
Cameron Parker it’s Michael bruh
BRUHHH LMFAO HI
@@lithiumcandy4304 who u? 😂
Guapify guess
@@lithiumcandy4304 what grade
I hate having to take ecology...such a nuisance....
I love Caroll asn the show but I still cringe every time I hear or see anything remotely sounding like "survival of the fittest". It's overselling the idea. "Survival of the fit" is far better IMO. Fittest tends to imply a winner rather than the reality that groups win, not individuals. It befuddles two different levels of explanation. "Fit" makes you take notice that extremes in fitness aren't necessarily beneficial and don't necessarily imply survival.
Just a rant...
this is a really excellent video to explain a real world example of very basic natural selection in video format. great upload. ill have to show my nephew.
Surely there must be some behavioural adaptation too? No? Wouldn't black mouse tend to live in rocky environment and light mouse in sandy environment?
man this just reminded me how much i hate bio
number 7 man gets eaten by mouse in russia
What’s up Ms rhuligs class!
Ayo
Did they just kill the mouse?
Oh god don't talk about Snickers. I'm on a diet.
Am I the only one watching this purely for entertainment?
yeah touch a womin
mr bauser gang
Imagination.
i want one
cool beans
Same
Very good video. Thank you
bot
natural selection, mutations and adaptation: all is almost crystal clear! what's left? why our ideas doesn't change synchronously as species do
This is a great vid. I'd forgotten about it - thanks for posting!
ever heard of the peppered moth study?
I’m literally here for my 6th grade Honors Science Class
Don't care
Andrew Prell did I ask for your opinion???
Andrew Prell your probably a non honors kid too
@@uv5842 don't care
@Alissa Cohen OMG REALLY? WHAT A COINCIDENCE
Nice. John Endler's experiment with guppies also demonstrates rapid evolution. Likewise with the Lizards of Pod Mrcaru.
crip gang
Comentario salvaje en español aparece!!!
great video
Here's a question and I'm not being skeptical here what are the odds of a mutation that helps the survival of an animal to occur I mean out of millions and millions of genes in our DNA what are the odds of that very gene to mutate to adapt to the circumstances not to mention in less than 1000 years period it's seems kinda unlikely or at least the population would go extinct before they can adapt
+Fahad Al Azawi There are a couple of things to keep in mind about evolution, that I think are not stressed enough.
We only have 20,00-25,000 genes. Different types of mutation are much more complicated than usually talked about. For example, there are many mutations that effect the expression of a gene, not it's structure. Whole genes can be duplicated, allowing the 2 copies to evolve in different directions. Different pieces of genes can be combined to make new genes. Genetics in Evolution is much more complicated than single point mutations.
In the case of the pocket mice here, it is mutations in hair color genes. As they said, different groups of these mice have independent mutations in different genes that all result in the same change in hair color....So it isn't just a single mutation that has to randomly occur. Different mutations can lead to the same result.
It really needs to be stressed that evolution is a response to environmental pressure that effects a population. Each individual has at least a thousand independent random mutations. As they said, if only 1 in 100,000 mice has a mutation that leads to black hair, but you have several 100,000 new mice a year, then you always have some black colored mice in the population for selection to apply to.
I think that is a major point. A large population will always have a large pool of mutations already existing for selection. It's not the case that evolution waits for that 1 mouse with that one amazingly rare mutation....
Finally, the speed of evolutionary change is dependent on how strong the selective pressure is. In this case, light colored mice are more likely to be eaten than dark colored mice, but it's not 100%. In the example given, they give dark mice a range of 1% to 10% survival advantage, so even light colored mice have a good chance of surviving to breed. Dark color is only an advantage, but enough that over time most of the mice will be dark.
People get too hung up on "the survival of the fittest" and think it's an all or none, and that there is one ultimate "fit" that is Evolution's goal, but It isn't. Maybe it should be "The better chance of survival of the fitter for that specific environment"... not as catchy, I know, but much more accurate.
If the pressure is too extreme, and no variation in the population gives enough of a survival advantage, then yes, they will go extinct before they can adapt. That's why a small population, or one with little variation, has a harder time adapting.
Any chance that "mutation" was already present as a recessive allele? Could it have been present for as long as the clear-fur allele, but only got to display itself given the change in the environment?
+Marco Chinchay Exactly! 3:12 is where the video falls apart for me; it essentially reveals that the video's main point is operating under the strangely illogical assumption that the dark fur was due to a set of mutations and not simply a recessive allele. Quite silly.
I honestly don't know, I'm just a scienteist and what we do is ask questions. Sounds like Charles knows, though
***** Good point.
you are assuming the environmental features specifying the natural selection pressure favoring the dark colored mice stays the same for a hundred or thousand years but the environment constantly changes as is commonly observed. how does this affect natural selection?
+goerizal1 That specific environment doesnt really change...
+goerizal1 Natural selection pressure comes from whatever is the current environment. If being light colored becomes an advantage because of some change in the environment, then the selection will head in that direction. Color could switch back and forth between light and dark many times, if the environment keeps changing. In this case, it's hard to imagine how the rock color is going to change, but I guess if they were all painted white for some reason.
Check out the Peppered moth, it's a great example of color change as a response to new environmental pressure.
the issue here is how fast the genome can change to adapt to the environment which is also changing and with that, its natural selection process.
goerizal1 The genome doesn't change. The species that already have the advantage live while the others die. then they pass on the advantageous genes...
its not like white mice just turn black. No the black ones live longer so they can populate more. Thus the AVERAGE species becomes black because more black ones are having kids..
one of the basis of evolution is genome change mostly thru random mutation.
Evolutionists love telling stories about favourable mutations in a genome, but have no explanation for the origin of the genome itself. The truth is that most (like 99.999%) mutations are either harmful, fatal or neutral, and the very rare benefiical mutations do not add information to the genome. Of course there is not much we can do in biological life to be 'fit' as we have to play with the set of genetic cards that we are dealt.
This is not the case however with super-natural selection. You choose whether you want to be selected or not. Faith in Jesus Christ (as Creator and Savioiur) gets you 'selected', whereas rejection of JC gets you eliminated. The eternal outcome is that only the spiritually fit will survive. God will not allow anything that defiles in His kingdom.
So your basically saying that God is a ruthless dictator who punishes all who a pose him . Nice thing to believe in , a violent dictatorship , very holy
Ross Laidlaw brovo
+Stuart Main You make the word idiot seem inadequate.
Blade RIP
I take it you are using 'idiot' as an acronym? Intelligent Design Is Obvious Today?
Now moron also seems inadequate.
evolution is a fairytale
sarud durdstrom Hahaha. what do you believe in then?
@@tehnoobshowloverlol sky daddy 😂
I would love to see Hovind or Ham try to explain this away.