Kaj pravzaprav naredi nekaj "živo"? Biologija je veda o življenju,... Show more
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Updated May 12, 2026
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Kaj so značilnosti živih bitij?
1 / 5
Osnove življenja in ključni pojmi
Živo bitje mora izpolniti določene pogoje, da ga lahko ločimo od nežive narave. Organizem je vsak posamezen primerek živega sveta, ki kaže vse značilnosti življenja.
Celica je osnovna gradbena enota vseh živih bitij. Predstavljaj si jo kot najmanjšo "tovarno", ki lahko samostojno živi in opravlja vse potrebne funkcije.
Presnova ali metabolizem zajema vse kemijske reakcije v organizmu za pridobivanje energije. Deli se na anabolizem (gradnjo) in katabolizem (razgradnjo) - kot gradbena dela v telesu.
💡 Zapomniti si moraš: Homeostaza je sposobnost vzdrževanja stabilnega notranjega okolja, ne glede na zunanje spremembe.
Celična zgradba in presnova
Vsa živa bitja so zgrajena iz ene ali več celic. Enoceličarji kot bakterije in amebe imajo samo eno celico, ki opravlja vse funkcije. Mnogoceličarji kot človek imajo milijarde specializiranih celic.
Presnova je način, kako organizmi pridobijo energijo. Avtotrofi (rastline) si sami izdelajo hrano s fotosintezo iz CO₂ in H₂O. Heterotrofi (živali, glive) morajo jesti druge organizme.
Fotosinteza deluje po formuli: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. To pomeni, da rastline iz ogljikovega dioksida in vode naredijo sladkor in kisik.
💡 Praktičen nasvet: Za test obvezno znaš razliko med avtotrofi in heterotrofi - kdo si sam naredi hrano in kdo mora jesti druge.
Rast, razvoj in razmnoževanje
Rast pomeni povečanje velikosti, razvoj pa spremembe oblike in funkcije. Ne mešaj ju! Gosenica raste, ko postane večja, razvija pa se, ko se spremeni v metulja.
Razmnoževanje ustvarja nove potomce. Nespolno razmnoževanje pomeni enega starša in genetsko enake potomce (klone). Spolno razmnoževanje potrebuje dva starša in ustvari genetsko različne potomce.
Odzivnost pomeni, da se organizmi odzivajo na dražljaje iz okolja. Sončnica se obrača proti soncu, ti pa umaknesh roko od vroče peči.
💡 Pomembno: Razmnoževanje ni nujno za preživetje posameznika, ampak je ključno za ohranitev vrste.
Dednost, homeostaza in evolucija
Dednost pomeni prenašanje lastnosti s starših na potomce preko genov v DNA. Zato imaš podobne oči kot starši - to ni naključje, ampak genetika.
Homeostaza vzdržuje stabilno notranje okolje. Ko ti je vroče, se potiš. Ko ti je hladno, drgetes. Telo se samo uravnava, da ostane zdravo.
Evolucija pomeni, da se populacije prilagajajo okolju skozi generacije. Žirafe z daljšimi vratovi so imele dostop do več hrane, zato so preživele in se razmnoževale.
💡 Za test: Homeostaza ni samo uravnavanje temperature - zajema tudi sladkor v krvi, količino vode in soli v telesu.
Primeri in povzetek
Primerjajmo mačko (živo bitje), kamen (neživo) in virus (na meji). Mačka izpolni vseh 8 značilnosti. Kamen nobene. Virus ima samo dednost in razmnoževanje, vendar potrebuje gostiteljsko celico.
Virus ni pravo živo bitje, ker nima celic, lastne presnove in se ne more samostojno razmnoževati. Je kot biološki "robot", ki se aktivira šele v celici.
Hitri povzetek 8 značilnosti: celična zgradba, presnova, rast in razvoj, razmnoževanje, odzivnost, dednost, homeostaza, evolucija. Za test moraš znati vse našteti in podati primere!
💡 Ključno: Predmet mora pokazati VSE značilnosti, da je živ. Ena sama (kot gibanje) ni dovolj.
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
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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
Kaj so značilnosti živih bitij?
Kaj pravzaprav naredi nekaj "živo"? Biologija je veda o življenju, vendar mora vsako živo bitje izpolniti 8 ključnih pogojev, da ga lahko opredelimo kot organizem. Te značilnosti ločijo bakterije, rastline in živali od nežive narave, kot so kamni ali voda.
Osnove življenja in ključni pojmi
Živo bitje mora izpolniti določene pogoje, da ga lahko ločimo od nežive narave. Organizem je vsak posamezen primerek živega sveta, ki kaže vse značilnosti življenja.
Celica je osnovna gradbena enota vseh živih bitij. Predstavljaj si jo kot najmanjšo "tovarno", ki lahko samostojno živi in opravlja vse potrebne funkcije.
Presnova ali metabolizem zajema vse kemijske reakcije v organizmu za pridobivanje energije. Deli se na anabolizem (gradnjo) in katabolizem (razgradnjo) - kot gradbena dela v telesu.
💡 Zapomniti si moraš: Homeostaza je sposobnost vzdrževanja stabilnega notranjega okolja, ne glede na zunanje spremembe.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Celična zgradba in presnova
Vsa živa bitja so zgrajena iz ene ali več celic. Enoceličarji kot bakterije in amebe imajo samo eno celico, ki opravlja vse funkcije. Mnogoceličarji kot človek imajo milijarde specializiranih celic.
Presnova je način, kako organizmi pridobijo energijo. Avtotrofi (rastline) si sami izdelajo hrano s fotosintezo iz CO₂ in H₂O. Heterotrofi (živali, glive) morajo jesti druge organizme.
Fotosinteza deluje po formuli: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. To pomeni, da rastline iz ogljikovega dioksida in vode naredijo sladkor in kisik.
💡 Praktičen nasvet: Za test obvezno znaš razliko med avtotrofi in heterotrofi - kdo si sam naredi hrano in kdo mora jesti druge.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Rast, razvoj in razmnoževanje
Rast pomeni povečanje velikosti, razvoj pa spremembe oblike in funkcije. Ne mešaj ju! Gosenica raste, ko postane večja, razvija pa se, ko se spremeni v metulja.
Razmnoževanje ustvarja nove potomce. Nespolno razmnoževanje pomeni enega starša in genetsko enake potomce (klone). Spolno razmnoževanje potrebuje dva starša in ustvari genetsko različne potomce.
Odzivnost pomeni, da se organizmi odzivajo na dražljaje iz okolja. Sončnica se obrača proti soncu, ti pa umaknesh roko od vroče peči.
💡 Pomembno: Razmnoževanje ni nujno za preživetje posameznika, ampak je ključno za ohranitev vrste.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Dednost, homeostaza in evolucija
Dednost pomeni prenašanje lastnosti s starših na potomce preko genov v DNA. Zato imaš podobne oči kot starši - to ni naključje, ampak genetika.
Homeostaza vzdržuje stabilno notranje okolje. Ko ti je vroče, se potiš. Ko ti je hladno, drgetes. Telo se samo uravnava, da ostane zdravo.
Evolucija pomeni, da se populacije prilagajajo okolju skozi generacije. Žirafe z daljšimi vratovi so imele dostop do več hrane, zato so preživele in se razmnoževale.
💡 Za test: Homeostaza ni samo uravnavanje temperature - zajema tudi sladkor v krvi, količino vode in soli v telesu.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Primeri in povzetek
Primerjajmo mačko (živo bitje), kamen (neživo) in virus (na meji). Mačka izpolni vseh 8 značilnosti. Kamen nobene. Virus ima samo dednost in razmnoževanje, vendar potrebuje gostiteljsko celico.
Virus ni pravo živo bitje, ker nima celic, lastne presnove in se ne more samostojno razmnoževati. Je kot biološki "robot", ki se aktivira šele v celici.
Hitri povzetek 8 značilnosti: celična zgradba, presnova, rast in razvoj, razmnoževanje, odzivnost, dednost, homeostaza, evolucija. Za test moraš znati vse našteti in podati primere!
💡 Ključno: Predmet mora pokazati VSE značilnosti, da je živ. Ena sama (kot gibanje) ni dovolj.
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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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