Evolution of Eukaryotes
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- Опубліковано 30 вер 2024
- Going from prokaryotes to eukaryotes was a BIG deal. This videos explores how eukaryotes gained the nuclear envelope and membrane around the endoplasmic reticulum. Endosymbiosis is explained showcasing how ancestral prokaryotes may have engulfed aerobic and photosynthetic prokaryotes to get the mitchondria and chloroplasts that we have today.
FIRST TIME I understand the TRANSITION
It can definitely be difficult, especially because we can't replicate it in the lab (...yet...), glad this helped!
11:26 again not a super strong piece of evidence, ... and then finally and 👍 what I think is probably the most important or strongest piece of evidence is the way they reproduce or the way they replicate ... 11:58 and we never really talk about what happens to the organelles. So waht happens with the organelles is once that DNA splits and we have our two new cells that the DNA actually has the codes on how to make on how to make the organelle so a new endoplasmic reticulum gets made a new golgi apparatus gets made but our DNA lacks the instructions to make a chloroplast our DNA doesn't know how to make mitochondria. Instead, what happens is while the cell's undergoing mitosis different hormones or chemical signals are being sent and the mitochondria and the chloroplasts know those signals and when it senses those signals or receives those signals it signals for them to start replicating themselves and they replicate through fission which is kind of like an asexual reproduction where they start splitting so mitochondria gets the signal ... mitochondria on their own reproduce they duplicate themselves. 13:07 13:24 ... the fact that our cells have no idea how to make these organelles and those organelles can reproduce on their own. 👍This is telling us something like, ... it doesn't make sense that this our DNA can't, doesn't, has no idea how to make them, it makes a lot more sense to be like okay there were outsider organelles, ... these were organelles that our original cells acquired billions of years ago but they're still little pieces of history stuck with them I think that's kind of fascinating that we still see the remnants of their ancestral past even though they're doing such integrated work within our cells now.
Thank you for your insights. Do you realy think Eucaryotes evolved befor the Great Oxidation Event?
Overcrowding, the substrate of evolution 🔺
THANK YOU SO MUCH. I finally understand it
Professor, I need private lessons!
thank you.
Why is it so hard to replicate in the lab? I have seen videos of microorganisms with symbiotic relationship with photosynthetic organisms inside of them.
Also, the reason why I fell into this rabbit hole of eukaryotic evolution is because of the fermi paradox. One possible explanation why we don't see any alien civilizations is that the transition from prokaryotic life to eukaryotic life is extremely unlikely and rare. What are your thoughts on this and the fermi paradox? It would be cool if you made a video on it :)
You’re totally right! There’s lots of organisms with photosynthetic endosymbionts (lichen and coral come to mind), but I think the replication issue is how do WE make it an endosymbiont, versus the cell just wanting to eat the algae. If we were to get lucky and there was a cell line that decided not to eat the algae and just coexist - that would be perfect - but then we have to wait for many, many, many generations (past any one scientists lifetime) for them to become a single organism. It’s not impossible; but, it isn’t likely either.
I have no doubt that transition to prokaryotes to eukaryotes is very rare in our universe - but we also don’t know what else is out there ;)
Very helpful!
Glad it was helpful!
Nice video! Just shared with someone who I thought would benefit from knowing about the eukaryotic revolution. :)
Subscribed!
OMG you explained this concept so simple and effortlessly and it made so much sense, Thank you very much❤❤❤