Evolucija je eden najpomembnejših konceptov v biologiji, ki razlaga, kako... Show more
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Updated Apr 21, 2026
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Osnove evolucije: kako deluje in zakaj je pomembna
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Kaj je evolucija?
Predstavljaj si, da bi lahko videl, kako se živa bitja spreminjajo skozi milijone let - od majhnih bakterij do ogromnih kitov. Evolucija je prav to: postopno spreminjanje dednih lastnosti v populacijah organizmov skozi generacije.
Ključno je razumeti, da se ne spreminjajo posamezniki, ampak populacije. Ti se ne moreš evolucijsko prilagoditi med svojim življenjem, lahko pa se prilagodi tvoja vrsta skozi generacije.
Naravni izbor je glavni motor evolucije. Deluje preprosto: tisti osebki, ki so bolje prilagojeni na svoje okolje, imajo večje možnosti preživetja in več potomcev. Njihove ugodne lastnosti se tako širijo po populaciji.
Pomembno: Evolucija nima cilja! Ne vodi k "popolnosti", ampak le k boljši prilagoditvi na trenutne razmere v okolju.
Kako deluje naravni izbor?
Naravni izbor deluje v petih preprostih korakih, ki se nenehno ponavljajo. Najprej imamo variabilnost - v vsaki populaciji so osebki različni (nekateri zajci so hitrejši, drugi počasnejši).
Te različne lastnosti so dedne - prenašajo se preko genov s staršev na potomce. Ker pa se rodi več potomcev, kot jih lahko preživi, pride do boja za obstanek. Hrana, prostor in partnerji so omejeni.
Tukaj pride do ključnega koraka: osebki z ugodnimi lastnostmi lažje preživijo in imajo več potomcev. Hiter zajec bo pobegnil lisici, počasen pa ne. Skozi čas se bo v populaciji nabralo vse več hitrih zajcev - populacija evolvira.
Primer: Če bi danes vsi jemali antibiotike nepravilno, bi preživele le odporne bakterije. V nekaj generacijah bi nastala populacija, ki bi bila popolnoma odporna.
Dokazi za evolucijo
Evolucijo podpirajo dokazi iz različnih področij znanosti. Fosili so kot fotografije iz preteklosti - kažejo nam, kako so se vrste spreminjale skozi milijone let. Najdemo lahko tudi prehodne oblike, ki povezujejo različne skupine.
Primerjalna anatomija primerja zgradbo organizmov. Homologni organi imajo enak osnovni načrt (roka človeka, plavut kita, krilo netopirja), kar dokazuje skupnega prednika. Analogni organi pa opravljajo podobno funkcijo, vendar so se razvili neodvisno (krilo ptiča in žuželke).
Embriologija kaže, da so si zarodki različnih vretenčarjev v zgodnjih fazah zelo podobni. Molekularna biologia pa primerja DNA - bolj kot sta si vrsti sorodni, podobnejša je njuna genetska koda.
Zanimivost: Tvoja DNA je 98,8% enaka DNA šimpanza in kar 60% enaka DNA banane! To kaže na skupen izvor vseh živih bitij.
Primeri iz resničnega življenja
Brezov pedic je postal slovit primer naravnega izbora v akciji. Pred industrijsko revolucijo so bili svetli metulji dobro skriti na svetlih deblih brez. Ko so debla zaradi saj postala temna, so imeli prednost temni metulji.
Ptice so lažje opazile svetle metullje, zato so imeli temni boljše možnosti preživetja. V nekaj desetletjih se je delež temnih metuljev v populaciji močno povečal. Ko se je onesnaženje zmanjšalo, se je proces obrnil.
Odpornost bakterij na antibiotike je sodoben primer evolucije. V populaciji bakterij je zaradi mutacij vedno nekaj odpornih osebkov. Ko vzamemo antibiotik, pobije večino občutljivih bakterij, preživijo pa odporne. Te se nato hitro razmnožijo.
Nasvet: Zato je ključno, da antibitoke jemlješ točno po navodilih zdravnika in do konca - sicer "treniraš" bakterije, da postanejo odporne!
Ključni poudarki za izpit
Za uspešno opravljanje izpita si zapomni te ključne točke. Evolucija je spreminjanje dednih lastnosti populacij skozi generacije, glavni mehanizem pa je naravni izbor.
Pogoji za naravni izbor so: variabilnost v populaciji, dednost lastnosti, boj za obstanek in različno preživetje glede na lastnosti. Rezultat so prilagoditve na okolje.
Glavni dokazi vključujejo fosile, homologne in analogne organe, embriologijo ter primerjavo DNA. Ne pozabi na primera brezovega pedica in odpornosti bakterij - odlična sta za razlago na izpitu.
Opomnik: Posameznik se ne more evolucijsko prilagoditi med življenjem. Evolucija se dogaja na ravni populacij skozi generacije!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content in Biologija
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Osnove evolucije: kako deluje in zakaj je pomembna
Evolucija je eden najpomembnejših konceptov v biologiji, ki razlaga, kako so nastala vsa živa bitja na Zemlji. Gre za proces, ki se dogaja pred našimi očmi - od odpornosti bakterij na antibiotike do sprememb pri živalih zaradi podnebnih sprememb.
Kaj je evolucija?
Predstavljaj si, da bi lahko videl, kako se živa bitja spreminjajo skozi milijone let - od majhnih bakterij do ogromnih kitov. Evolucija je prav to: postopno spreminjanje dednih lastnosti v populacijah organizmov skozi generacije.
Ključno je razumeti, da se ne spreminjajo posamezniki, ampak populacije. Ti se ne moreš evolucijsko prilagoditi med svojim življenjem, lahko pa se prilagodi tvoja vrsta skozi generacije.
Naravni izbor je glavni motor evolucije. Deluje preprosto: tisti osebki, ki so bolje prilagojeni na svoje okolje, imajo večje možnosti preživetja in več potomcev. Njihove ugodne lastnosti se tako širijo po populaciji.
Pomembno: Evolucija nima cilja! Ne vodi k "popolnosti", ampak le k boljši prilagoditvi na trenutne razmere v okolju.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Kako deluje naravni izbor?
Naravni izbor deluje v petih preprostih korakih, ki se nenehno ponavljajo. Najprej imamo variabilnost - v vsaki populaciji so osebki različni (nekateri zajci so hitrejši, drugi počasnejši).
Te različne lastnosti so dedne - prenašajo se preko genov s staršev na potomce. Ker pa se rodi več potomcev, kot jih lahko preživi, pride do boja za obstanek. Hrana, prostor in partnerji so omejeni.
Tukaj pride do ključnega koraka: osebki z ugodnimi lastnostmi lažje preživijo in imajo več potomcev. Hiter zajec bo pobegnil lisici, počasen pa ne. Skozi čas se bo v populaciji nabralo vse več hitrih zajcev - populacija evolvira.
Primer: Če bi danes vsi jemali antibiotike nepravilno, bi preživele le odporne bakterije. V nekaj generacijah bi nastala populacija, ki bi bila popolnoma odporna.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Dokazi za evolucijo
Evolucijo podpirajo dokazi iz različnih področij znanosti. Fosili so kot fotografije iz preteklosti - kažejo nam, kako so se vrste spreminjale skozi milijone let. Najdemo lahko tudi prehodne oblike, ki povezujejo različne skupine.
Primerjalna anatomija primerja zgradbo organizmov. Homologni organi imajo enak osnovni načrt (roka človeka, plavut kita, krilo netopirja), kar dokazuje skupnega prednika. Analogni organi pa opravljajo podobno funkcijo, vendar so se razvili neodvisno (krilo ptiča in žuželke).
Embriologija kaže, da so si zarodki različnih vretenčarjev v zgodnjih fazah zelo podobni. Molekularna biologia pa primerja DNA - bolj kot sta si vrsti sorodni, podobnejša je njuna genetska koda.
Zanimivost: Tvoja DNA je 98,8% enaka DNA šimpanza in kar 60% enaka DNA banane! To kaže na skupen izvor vseh živih bitij.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Primeri iz resničnega življenja
Brezov pedic je postal slovit primer naravnega izbora v akciji. Pred industrijsko revolucijo so bili svetli metulji dobro skriti na svetlih deblih brez. Ko so debla zaradi saj postala temna, so imeli prednost temni metulji.
Ptice so lažje opazile svetle metullje, zato so imeli temni boljše možnosti preživetja. V nekaj desetletjih se je delež temnih metuljev v populaciji močno povečal. Ko se je onesnaženje zmanjšalo, se je proces obrnil.
Odpornost bakterij na antibiotike je sodoben primer evolucije. V populaciji bakterij je zaradi mutacij vedno nekaj odpornih osebkov. Ko vzamemo antibiotik, pobije večino občutljivih bakterij, preživijo pa odporne. Te se nato hitro razmnožijo.
Nasvet: Zato je ključno, da antibitoke jemlješ točno po navodilih zdravnika in do konca - sicer "treniraš" bakterije, da postanejo odporne!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Ključni poudarki za izpit
Za uspešno opravljanje izpita si zapomni te ključne točke. Evolucija je spreminjanje dednih lastnosti populacij skozi generacije, glavni mehanizem pa je naravni izbor.
Pogoji za naravni izbor so: variabilnost v populaciji, dednost lastnosti, boj za obstanek in različno preživetje glede na lastnosti. Rezultat so prilagoditve na okolje.
Glavni dokazi vključujejo fosile, homologne in analogne organe, embriologijo ter primerjavo DNA. Ne pozabi na primera brezovega pedica in odpornosti bakterij - odlična sta za razlago na izpitu.
Opomnik: Posameznik se ne more evolucijsko prilagoditi med življenjem. Evolucija se dogaja na ravni populacij skozi generacije!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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Most popular content in Biologija
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Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user