Subjects
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
90
•
3 Dec 2025
•
annabelle
@annabelle_styles
The biological approach examines how our physical makeup shapes behaviour,... Show more
Your behaviour isn't just random - it all starts with biology. The biological approach assumes that everything we do has a physical cause, meaning our biological structure directly influences how we behave.
Scientists use twin studies to figure out what's inherited versus what's learned. Monozygotic twins (identical) share 100% of their genes, whilst dizygotic twins share about 50%. When researchers compare concordance rates between these twins, they can work out how much genetics influences specific traits.
Adoption studies offer another piece of the puzzle. By comparing adopted children to both their biological and adoptive parents, researchers can separate nature from nurture influences.
Your genotype is your complete set of genes, but your phenotype (what you actually look like and how you behave) equals your genotype plus your environment. Remember that dominant genes always show up, even with just one copy, whilst recessive genes need two copies to appear.
Key Point: Charles Darwin's theory of natural selection explains how behaviours that help survival and reproduction get passed down through generations, even if some traits become maladaptive in our modern environment due to genome lag.
Your nervous system is basically your body's electrical wiring, split into two main parts. The CNS (brain and spinal cord) is mission control, whilst the peripheral nervous system carries messages back and forth.
The peripheral system has two branches you need to know. The somatic nervous system handles voluntary movements like raising your hand. The autonomic nervous system runs the automatic stuff you don't think about, like your heartbeat.
Within the autonomic system, sympathetic arousal kicks in during stress - speeding up your heart, dilating your pupils, and prepping you for action. Parasympathetic arousal does the opposite, slowing things down and helping you relax.
Neurons are the messenger cells that make it all work. Sensory neurons carry information from your senses to your brain, motor neurons control muscle movement, and relay neurons pass messages within the CNS. Synaptic transmission happens when neurotransmitters jump across the tiny gaps between neurons, either causing excitation (firing the next neuron) or inhibition (stopping the signal).
Key Point: Think of synaptic transmission like passing notes in class - the message jumps from one neuron to another across the synapse, but sometimes the message gets through and sometimes it doesn't.
Your endocrine system is like your body's chemical messaging service. Hormones are powerful chemical messengers produced by glands that travel through your bloodstream to target specific organs.
When you face danger, your body launches the fight-or-flight response - an automatic survival mechanism that's been keeping humans alive for thousands of years. This isn't something you control; it's completely innate.
Here's how it works: your hypothalamus detects threat and activates the sympathetic branch of your nervous system. This triggers your adrenal glands to pump out adrenaline, which supercharges your body for action - faster heartbeat, sharper focus, and more energy.
The beauty of this system is its speed. Whilst your nervous system uses electrical signals for instant responses, your endocrine system provides the chemical backup that keeps you going during stressful situations.
Key Point: Your adrenal glands are your body's emergency broadcasters - when they release adrenaline, every cell with the right receptor gets the "danger alert" message instantly.
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.
Quotes from every main character
English LiteratureApp 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
annabelle
@annabelle_styles
The biological approach examines how our physical makeup shapes behaviour, exploring everything from our genes to our nervous system. It's the foundation for understanding why we act the way we do - from inherited traits to our body's automatic responses... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Your behaviour isn't just random - it all starts with biology. The biological approach assumes that everything we do has a physical cause, meaning our biological structure directly influences how we behave.
Scientists use twin studies to figure out what's inherited versus what's learned. Monozygotic twins (identical) share 100% of their genes, whilst dizygotic twins share about 50%. When researchers compare concordance rates between these twins, they can work out how much genetics influences specific traits.
Adoption studies offer another piece of the puzzle. By comparing adopted children to both their biological and adoptive parents, researchers can separate nature from nurture influences.
Your genotype is your complete set of genes, but your phenotype (what you actually look like and how you behave) equals your genotype plus your environment. Remember that dominant genes always show up, even with just one copy, whilst recessive genes need two copies to appear.
Key Point: Charles Darwin's theory of natural selection explains how behaviours that help survival and reproduction get passed down through generations, even if some traits become maladaptive in our modern environment due to genome lag.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Your nervous system is basically your body's electrical wiring, split into two main parts. The CNS (brain and spinal cord) is mission control, whilst the peripheral nervous system carries messages back and forth.
The peripheral system has two branches you need to know. The somatic nervous system handles voluntary movements like raising your hand. The autonomic nervous system runs the automatic stuff you don't think about, like your heartbeat.
Within the autonomic system, sympathetic arousal kicks in during stress - speeding up your heart, dilating your pupils, and prepping you for action. Parasympathetic arousal does the opposite, slowing things down and helping you relax.
Neurons are the messenger cells that make it all work. Sensory neurons carry information from your senses to your brain, motor neurons control muscle movement, and relay neurons pass messages within the CNS. Synaptic transmission happens when neurotransmitters jump across the tiny gaps between neurons, either causing excitation (firing the next neuron) or inhibition (stopping the signal).
Key Point: Think of synaptic transmission like passing notes in class - the message jumps from one neuron to another across the synapse, but sometimes the message gets through and sometimes it doesn't.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Your endocrine system is like your body's chemical messaging service. Hormones are powerful chemical messengers produced by glands that travel through your bloodstream to target specific organs.
When you face danger, your body launches the fight-or-flight response - an automatic survival mechanism that's been keeping humans alive for thousands of years. This isn't something you control; it's completely innate.
Here's how it works: your hypothalamus detects threat and activates the sympathetic branch of your nervous system. This triggers your adrenal glands to pump out adrenaline, which supercharges your body for action - faster heartbeat, sharper focus, and more energy.
The beauty of this system is its speed. Whilst your nervous system uses electrical signals for instant responses, your endocrine system provides the chemical backup that keeps you going during stressful situations.
Key Point: Your adrenal glands are your body's emergency broadcasters - when they release adrenaline, every cell with the right receptor gets the "danger alert" message instantly.
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.
3
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Quotes from every main character
English LiteratureApp 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
Psychology
Sociology