just dropping by to say thank you for this series! i've been looking to study these topics independently as a hobby but i was always overwhelmed by the mountains of information i had to sift through. being guided through the basics has been the most helpful thing! many cheers, professor!

I´m studying biology and it´s a good way to explain cladograms and phylogenetics :) Also it´s so important to diferenciate between homologous characters and analogous characters, since analogous characters can lead to false phylogenetic hypotheses

@PunmasterSTP

2 жыл бұрын

I'm just curious; how are your studies going?

@The_Jovian

Жыл бұрын

Are cladograms possible to make with certainty if you are unaware of which similarities are homologous and which are analogous?

Thank you so much! We have an evolution test tomorrow, and I am feeling confident now thanks to you!

Great presentation on cladograms, Professor Dave. Love this stuff!

Please upload more videos on Organic synthesis challenges and mechanism challenges. They really are helping alot.

@PunmasterSTP

2 жыл бұрын

Oh yeah that'd be awesome! I like videos breaking down individual reactions and mechanisms, but I think it's the synthesis (and retrosynthesis) questions that really tie everything together and lock in concepts.

This was brilliant! Thank you

Very informative video! Thank you!

A lot of thanks to you professor

This is very cool 👍 I've always liked these videos thanks for making them

Wow! Haven’t found good explanations in my native language an decided to switch over to English - so will explained, thank you!

Teaching a gizmo to 8th grade- this was perfect, thank you

You made it so simple 👍👍

Nice and very good explained, especially for non-scientists like me 😎👍

I love your playlists

Excellent video exemplifying the absurdity of the term more evolved

appreciate you dave!

Thank you, this is a topic that I love. Your explanation is very good.

Thanks professor Dave😊

Really glad you're covering cladistics!

@PunmasterSTP

2 жыл бұрын

Would you also say that you are..."clad"? 😎

Starting around 8:30 you mention that traits like flight or warm-bloodedness would be bad traits to choose for cladistic grouping as they are both examples of convergent evolution, not homology. While that's demonstrably true of those traits I feel like the way it's phrased almost implies we should choose traits that we know will give us an answer we pre-determined. It seems to me that really what you'd want to do is have as many traits as possible so that you can separate out homologous and analogous characters.

@MisterWillow

6 ай бұрын

Yes, this point deserves more explaining indeed. It seems like it is a random pick now.

Nice explanation 😄

But what about independently evolved characteristics?!?!?! (watches rest of video) Oh... um... yes, I see. Never mind.... :)

Thank you😊

i will cry from this course

While the clades cannot indicate chronology in the sense of an amount of time in absolute units nor do they imply a causal relationship, the phylogenetic tree of life must indicate them as branching in the order of their appearance, right? It works by assessing when that trait first appeared in a given lineage thereby separating that lineage from its parent group, right?

thank you

I would love to see a video how to incorporate convergent evolution in this type of system how would you incorporate a divergence and a convergence into this system as it would not account for all previous divergences being present on 2 converged characteristics. Would they have to be kept separate but the same?

@liser5566

2 жыл бұрын

Convergence can never be used to carry out a phylogenetic study since it is given by analogous characters, which are different in convergent groups Only derived homologous characters can be taken into account to make a cladogram

i bet this will spiral out of control and end up with a 1 hour crocoduck debunking because creationists reacted to this video like flatearthers to the other one.

@danbrisson432

2 жыл бұрын

I agree, very informative for those scientifically minded but for some it will be misrepresent by the “ Whack and Atheist” group or AIG news even though it has nothing to do with religious theology. This is taught even in Mainstream Colleges like Georgetown, (Catholic ), Syracuse ( Protestant) to name a few.

Love from India🇮🇳

This guy just explained my full Cladograms unit in Biology that ive been learning in school in less than 11 minutes. Thanks Dave

Clades are relatively new to me so I welcome this video. Still I am confused. Clades do not seem to be diagnostic but illustrative of decisions you have already made. You can reject similarities because you already know to reject them, like flight. I remember a statement from another KZreadr’s video that an animal is “... carnivorous, but not a carnivore”. Or that a certain creature belongs in a certain group despite not having a defined characteristic. I’m not sure I see what good they are if you can include or exclude a creature at will. But I’ll keep watching. Thanks.

@Angelmou

2 жыл бұрын

I assume the difference between homology and homoplasy will be explained later in detail.

YES! YES! YES!!!!

thanks

Cladograms? More like "Glad-ograms", because I'm really happy that you're covering these topics!

Great....🎉

If i ace this test your getting one sub.

Thank you so much biology Jesus i got an A cuz of this

Flashback to 8th grade. Sad that education failed these people.

@ProfessorDaveExplains

2 жыл бұрын

Who?

@tiedeman39

2 жыл бұрын

@@ProfessorDaveExplains Flat Earthers and young earth creationists, most likely

Don't house cats have quantum effects? Or this the wrong playlist?

@cryptocoinkiwi8272

Жыл бұрын

They can teleport if you sneak up behind them.

🤩🤩🤩🤩 wow

❤❤❤

I need to build a cladogram using primitive and derived characteristics, abcdefgh and ABCDEFGH, respectively. Of course the letters are mixed for each of 6 mystery creatures (1,2,3,4,5,6). The example cladogram starts the bottom branch with a capital "A", so this has me quite confused. Shouldn't each new branch show the next trait as a lowercase? I wish they were just giving physical characteristics as you have done.

@Dr.IanPlect

11 ай бұрын

Do you want to go through this?

@scratchoriginalsdh

11 ай бұрын

@@Dr.IanPlect thank you, I appreciate the offer, but class is long over and done with. I actually survived the question, and ended up with an overall 86 in the course -- not my best showing.

@Dr.IanPlect

11 ай бұрын

@@scratchoriginalsdh No problem, 86 what? %? If so, !!!

@scratchoriginalsdh

11 ай бұрын

@@Dr.IanPlect yes, that was a percentage. I believe forensic analyses of the human pelvis is what did me in, in that course. 🤣 I am taking online classes and I believe a hands-on experience would have made all the difference. (My in-person anthropology courses had me averaging a 3.9 GPA, so any number under 90 is hard to swallow).

@Dr.IanPlect

11 ай бұрын

@@scratchoriginalsdh High self-standards! I'm from the UK so I had to look up where 3.9 puts you on the scale, _highly_ ! By the way, I simply have to get this bit resolved; "The example cladogram starts the bottom branch with a capital "A", so this has me quite confused. Shouldn't each new branch show the next trait as a lowercase? I wish they were just giving physical characteristics as you have done." For easy reference throughout my queries, I'm using the cladogram in this vid 0:58 - are you referring to (what you likely _now_ know to be) the root? In other words, the bottom piece of line pointing toward the o in cladograms... - or do you _actually_ mean where the lizard is? (bear in mind, your test cladogram was likely rotated 90 degrees clockwise based upon your wording 'starts the bottom branch'. Or otherwise, where, in regard to the vid cladogram was that A?

Hey dave what happend to the debunk series that was too fun do sadhguru next!

@ProfessorDaveExplains

2 жыл бұрын

I will get to some more debunks eventually, I'm just taking a couple months to get ahead on my academic content.

@swoyaman4969

2 жыл бұрын

@@ProfessorDaveExplains sweet

I suspect that humans were deliberately chosen as not the final point of the second main example, to clearly show that having humans above all or the end point is not the point of this system. Something tells me that might be a common misconception for some. :-\

thank you, my lab made it super hard to understand

7:30

5:47 7:20

Is Cladistics replacing Taxonomy? I feel like I don't know enough about either to answer my own question.

@secularidiot9052

Жыл бұрын

Taxonomy is a hierarchal classification system while cladistics is a conceptual classification system. Taxonomy covers how a group of organisms has something in common while cladistics focuses on how individual animals have something in common. Taxonomy covers all organisms while cladistics hones in on animals and plants. Taxonomy is broad, cladistics is specific. Neither one replaces the other.

@Iamtheskidoostig

Жыл бұрын

@secularidiot9052 much appreciated!

@Dr.IanPlect

Жыл бұрын

@@secularidiot9052 That's a vague, inaccurate comparison and representation of each. As I've now told him, KONG should disregard your comment altogether.

@Dr.IanPlect

Жыл бұрын

@@Iamtheskidoostig That reply was a vague, inaccurate comparison and representation of each. You should disregard that comment altogether.

@secularidiot9052

Жыл бұрын

@@Dr.IanPlect Well, it was not meant to be a specific comparison. It was just supposed to be a rudimentary description and explanation on why one doesn't replace the other. If you believe that you can provide a better one, then be my guest. If you do have a doctorate in this field, then you would be far better at explaining this than I would.

Hair like Reńe Descartes.

I fucking love you

Hi classmates

Lots of funny words

Dave, how are you still pronouncing it 'spee-shees'? It's "species," like "specific." We don't say "spe-shific" so we don't say "spee-shees."

@ProfessorDaveExplains

2 ай бұрын

That's not how English phonetics works. I'm saying it correctly.

@rheiagreenland4714

2 ай бұрын

Both 'speeshees' and 'speesees' are valid and common ways of p pronouncing it

@rickrhay

2 ай бұрын

@@rheiagreenland4714 Amongst us biologists, it's something of a shibboleth, to tell the difference between fellow scientists and media presenters.

@rheiagreenland4714

2 ай бұрын

@@rickrhay i think if you're determining expertise or scientifc integrity based on minor pronunciation differences in already ambiguous words you're doing it wrong

@rickrhay

2 ай бұрын

@@rheiagreenland4714 I don't know about that. Specificity matters in science. But hey, feel free to pronounce it any way you want.

Dr. Kent Hovind dislikes this.

@bighairyviking387

2 жыл бұрын

I think you give that charlatan to much respect by referring to him as a doctor, considering his degree is a fake that he bought.

Earht is flat

@ProfessorDaveExplains

2 жыл бұрын

You're a little lost, sweetie.

This is worst then math

@Dr.IanPlect

11 ай бұрын

Your priority is grammar.

@tfdinformation7534

11 ай бұрын

@@Dr.IanPlect what do you mean?

@Dr.IanPlect

11 ай бұрын

@@tfdinformation7534 ffs! Read your comment...now mine!

@tfdinformation7534

11 ай бұрын

@@Dr.IanPlect 🌚🌝 how can i understand Greek language or latin , it's stupid to use it , it just make things worst , why don't they invent a new language and teaches for us instead of this mess

@Dr.IanPlect

11 ай бұрын

@@tfdinformation7534 Nil to do with Greek or Latin! It's YOUR comment!