Maths
Chemistry
Biology
English Language
History
Responding to change (a2 only)
Infection and response
Homeostasis and response
Energy transfers (a2 only)
Cell biology
Organisms respond to changes in their internal and external environments (a-level only)
Biological molecules
Organisation
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
Show all topics
Britain & the wider world: 1745 -1901
1l the quest for political stability: germany, 1871-1991
The cold war
Inter-war germany
Medieval period: 1066 -1509
2d religious conflict and the church in england, c1529-c1570
2o democracy and nazism: germany, 1918-1945
1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
2m wars and welfare: britain in transition, 1906-1957
World war two & the holocaust
2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
World war one
Britain: 1509 -1745
Show all topics
Biology
9 Dec 2025
113
2 pages
Gabriela @gabriela.my.school.journey16
All living organisms need to reproduce to continue their species, but they don't all do it the same... Show more
Ever wondered how some creatures can reproduce on their own whilst others need a partner? Asexual reproduction involves just one parent creating genetically identical offspring (clones) through mitosis. There's no fertilisation happening here - no fusion of gametes at all.
Sexual reproduction is completely different and involves two parents. It requires fertilisation - the fusion of male and female gametes (sex cells). This process uses meiosis to create offspring that are genetically different from their parents.
Gametes are the specialised sex cells that make sexual reproduction possible. In animals, these are sperm and egg cells, whilst flowering plants use pollen (male) and egg cells (female).
Quick Tip Remember that some clever organisms can actually switch between both methods depending on what suits their current situation best!
You'll find both reproduction methods everywhere in nature. Malarial parasites are particularly sneaky - they reproduce asexually inside human hosts but switch to sexual reproduction when they're in mosquitoes. Plants like strawberries send out runners for asexual reproduction, whilst daffodils divide their bulbs.
Asexual reproduction is brilliantly efficient - it's faster, needs no mate, and passes on successful traits directly. However, this creates a major vulnerability all offspring are genetically identical, making them susceptible to the same diseases and environmental changes.
Sexual reproduction takes more time and energy since finding a mate is costly. But here's the payoff - the genetic variation it creates gives populations a massive survival advantage when conditions change.
Real Impact This is why farmers worry about crop diseases wiping out entire fields of genetically identical plants, but celebrate genetic diversity in breeding programmes!
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
2
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore key concepts in AQA Biology Paper 2, including genetic engineering, diabetes, ecosystems, homeostasis, and evolution. This summary covers essential topics such as the carbon and water cycles, hormonal regulation, and the impact of human activities on biodiversity. Ideal for students preparing for their exams, this resource provides a concise review of critical biological principles and processes.
BiologyExplore the fundamentals of genetics and reproduction, including DNA structure, mitosis, meiosis, and inheritance patterns. This summary covers key concepts such as sexual and asexual reproduction, Punnett squares, and Mendelian genetics, providing a comprehensive understanding of genetic information and variation. Ideal for students studying combined science.
BiologyExplore the key components of male, female, and plant reproductive systems, including the processes of sexual and asexual reproduction. This summary highlights the roles of gametes, fertilization, and the significance of genetic variation. Ideal for students studying biology and reproductive mechanisms.
BiologyExplore key concepts in genetics and evolution, including inheritance patterns, genetic engineering, and the fossil record. This summary covers essential topics for AQA Biology Paper 2, focusing on genetic variation, natural selection, and the implications of genetically modified organisms (GMOs). Ideal for higher-level students preparing for exams.
BiologyExplore the mechanisms of reproduction in organisms, including sexual and asexual reproduction, meiosis and mitosis, genetic disorders, and the role of DNA in inheritance. This summary covers key concepts such as gametes, genetic variation, and the implications of dominant and recessive alleles. Ideal for AQA GCSE Biology students.
BiologyExplore comprehensive knowledge organisers for AQA GCSE Biology, covering essential topics such as cell structure, genetics, ecosystems, and human biology. These concise summaries are designed to enhance your understanding and retention of key concepts, making them perfect for revision and exam preparation.
BiologyApp Store
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. 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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. 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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Gabriela
@gabriela.my.school.journey16
All living organisms need to reproduce to continue their species, but they don't all do it the same way. Understanding the two main types of reproduction - asexual and sexual - will help you grasp how life perpetuates itself and... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Ever wondered how some creatures can reproduce on their own whilst others need a partner? Asexual reproduction involves just one parent creating genetically identical offspring (clones) through mitosis. There's no fertilisation happening here - no fusion of gametes at all.
Sexual reproduction is completely different and involves two parents. It requires fertilisation - the fusion of male and female gametes (sex cells). This process uses meiosis to create offspring that are genetically different from their parents.
Gametes are the specialised sex cells that make sexual reproduction possible. In animals, these are sperm and egg cells, whilst flowering plants use pollen (male) and egg cells (female).
Quick Tip: Remember that some clever organisms can actually switch between both methods depending on what suits their current situation best!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
You'll find both reproduction methods everywhere in nature. Malarial parasites are particularly sneaky - they reproduce asexually inside human hosts but switch to sexual reproduction when they're in mosquitoes. Plants like strawberries send out runners for asexual reproduction, whilst daffodils divide their bulbs.
Asexual reproduction is brilliantly efficient - it's faster, needs no mate, and passes on successful traits directly. However, this creates a major vulnerability: all offspring are genetically identical, making them susceptible to the same diseases and environmental changes.
Sexual reproduction takes more time and energy since finding a mate is costly. But here's the payoff - the genetic variation it creates gives populations a massive survival advantage when conditions change.
Real Impact: This is why farmers worry about crop diseases wiping out entire fields of genetically identical plants, but celebrate genetic diversity in breeding programmes!
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
2
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore key concepts in AQA Biology Paper 2, including genetic engineering, diabetes, ecosystems, homeostasis, and evolution. This summary covers essential topics such as the carbon and water cycles, hormonal regulation, and the impact of human activities on biodiversity. Ideal for students preparing for their exams, this resource provides a concise review of critical biological principles and processes.
BiologyExplore the fundamentals of genetics and reproduction, including DNA structure, mitosis, meiosis, and inheritance patterns. This summary covers key concepts such as sexual and asexual reproduction, Punnett squares, and Mendelian genetics, providing a comprehensive understanding of genetic information and variation. Ideal for students studying combined science.
BiologyExplore the key components of male, female, and plant reproductive systems, including the processes of sexual and asexual reproduction. This summary highlights the roles of gametes, fertilization, and the significance of genetic variation. Ideal for students studying biology and reproductive mechanisms.
BiologyExplore key concepts in genetics and evolution, including inheritance patterns, genetic engineering, and the fossil record. This summary covers essential topics for AQA Biology Paper 2, focusing on genetic variation, natural selection, and the implications of genetically modified organisms (GMOs). Ideal for higher-level students preparing for exams.
BiologyExplore the mechanisms of reproduction in organisms, including sexual and asexual reproduction, meiosis and mitosis, genetic disorders, and the role of DNA in inheritance. This summary covers key concepts such as gametes, genetic variation, and the implications of dominant and recessive alleles. Ideal for AQA GCSE Biology students.
BiologyExplore comprehensive knowledge organisers for AQA GCSE Biology, covering essential topics such as cell structure, genetics, ecosystems, and human biology. These concise summaries are designed to enhance your understanding and retention of key concepts, making them perfect for revision and exam preparation.
BiologyApp Store
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. 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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. 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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Sociology