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59
•
Dec 29, 2025
•
Angela Martinez
@angelamartinez_tvoi
Plants are fascinating organisms that have evolved remarkable adaptations for... Show more
Plants developed several crucial adaptations that allowed them to conquer land environments. The cuticle prevents water loss while stomata (specialized openings) allow gas exchange for photosynthesis. This partnership is essential—the cuticle retains moisture while stomata let CO2 in and oxygen out.
Vascular tissue gives many plants a significant advantage on land. This specialized transport system includes xylem (which carries water and minerals upward) and phloem (which distributes food throughout the plant). Plants with this tissue can grow much larger than non-vascular plants like mosses.
Water remains a limiting factor for land plants. When water is scarce, plants must close their stomata to prevent dehydration, but this also blocks CO2 intake needed for photosynthesis. Seeds help overcome this challenge, as they contain an embryo protected by a tough seed coat and stored nutrients, allowing plants to survive harsh conditions until favorable growing conditions return.
Fun Fact: Mosses conduct photosynthesis in their leaf-like structures that are typically only one cell thick! Unlike vascular plants, they absorb water directly through their surfaces rather than through specialized tissue.
Plant cells differ from animal cells in three important ways: they have cell walls made of cellulose for structural support, chloroplasts where photosynthesis happens, and large central vacuoles for storing water and nutrients. These features enable plants to maintain their structure and manufacture their own food.
Leaves are perfectly designed for capturing sunlight. A typical leaf has several layers: the protective cuticle on top, the epidermis (outer layer), and the mesophyll cells where most photosynthesis occurs. Veins running through leaves contain the vascular tissue that transports water and nutrients.
Plants need specialized cells for different functions. Collenchyma cells allow plants to bend without breaking, providing flexibility during wind or movement. Root hairs extend from root epidermal cells to dramatically increase the surface area for absorbing water and minerals from soil.
Remember: The larger a leaf's surface area, the better its ability to absorb sunlight for photosynthesis! This is why plants in shady environments often develop larger leaves.
Flowering plants have evolved complex reproductive structures. The male reproductive organs are stamens, which consist of a filament supporting an anther where pollen develops. The female reproductive organ is the pistil, made up of a stigma (which receives pollen), a style (connecting tube), and an ovary containing ovules.
Pollination is the transfer of pollen from anther to stigma, which must occur before fertilization can take place. After fertilization, the zygote develops into an embryo inside a seed. The seed's protective coat and stored nutrients allow plant embryos to survive harsh conditions until they can germinate.
Plants can reproduce in two main ways: asexually or sexually. Asexual reproduction creates genetically identical offspring from a single parent, while sexual reproduction combines genetic material from two parents. Sexual reproduction increases genetic diversity, helping species adapt to changing environments.
Did you know? Many flowers have evolved specific colors, shapes, and scents to attract particular pollinators like bees, butterflies, or hummingbirds. This co-evolution has created some amazing partnerships in nature!
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.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App 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
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 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 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 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 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
Angela Martinez
@angelamartinez_tvoi
Plants are fascinating organisms that have evolved remarkable adaptations for life on land. In this module, we'll explore plant diversity, structure, and reproduction—three key aspects that help us understand how plants survive and thrive in various environments. These concepts form... Show more
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Plants developed several crucial adaptations that allowed them to conquer land environments. The cuticle prevents water loss while stomata (specialized openings) allow gas exchange for photosynthesis. This partnership is essential—the cuticle retains moisture while stomata let CO2 in and oxygen out.
Vascular tissue gives many plants a significant advantage on land. This specialized transport system includes xylem (which carries water and minerals upward) and phloem (which distributes food throughout the plant). Plants with this tissue can grow much larger than non-vascular plants like mosses.
Water remains a limiting factor for land plants. When water is scarce, plants must close their stomata to prevent dehydration, but this also blocks CO2 intake needed for photosynthesis. Seeds help overcome this challenge, as they contain an embryo protected by a tough seed coat and stored nutrients, allowing plants to survive harsh conditions until favorable growing conditions return.
Fun Fact: Mosses conduct photosynthesis in their leaf-like structures that are typically only one cell thick! Unlike vascular plants, they absorb water directly through their surfaces rather than through specialized tissue.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Plant cells differ from animal cells in three important ways: they have cell walls made of cellulose for structural support, chloroplasts where photosynthesis happens, and large central vacuoles for storing water and nutrients. These features enable plants to maintain their structure and manufacture their own food.
Leaves are perfectly designed for capturing sunlight. A typical leaf has several layers: the protective cuticle on top, the epidermis (outer layer), and the mesophyll cells where most photosynthesis occurs. Veins running through leaves contain the vascular tissue that transports water and nutrients.
Plants need specialized cells for different functions. Collenchyma cells allow plants to bend without breaking, providing flexibility during wind or movement. Root hairs extend from root epidermal cells to dramatically increase the surface area for absorbing water and minerals from soil.
Remember: The larger a leaf's surface area, the better its ability to absorb sunlight for photosynthesis! This is why plants in shady environments often develop larger leaves.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Flowering plants have evolved complex reproductive structures. The male reproductive organs are stamens, which consist of a filament supporting an anther where pollen develops. The female reproductive organ is the pistil, made up of a stigma (which receives pollen), a style (connecting tube), and an ovary containing ovules.
Pollination is the transfer of pollen from anther to stigma, which must occur before fertilization can take place. After fertilization, the zygote develops into an embryo inside a seed. The seed's protective coat and stored nutrients allow plant embryos to survive harsh conditions until they can germinate.
Plants can reproduce in two main ways: asexually or sexually. Asexual reproduction creates genetically identical offspring from a single parent, while sexual reproduction combines genetic material from two parents. Sexual reproduction increases genetic diversity, helping species adapt to changing environments.
Did you know? Many flowers have evolved specific colors, shapes, and scents to attract particular pollinators like bees, butterflies, or hummingbirds. This co-evolution has created some amazing partnerships in nature!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
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.
You can download the app in the Google Play Store and in the 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
Plants and animals
BiologyDifferences include shape, cell wall, chloroplasts, food, vacuoles, centrioles, lysosomes and fun fact about Robert Brown
Environmental ScienceUnit 5: The Diversity of Life Module 20: Introduction to Animals Lesson 1: Animal Characteristics Lesson 2: Animal Body Plans Biology 9A Notes
BiologyExplore the three main structures of animal cells: the nucleus, cell membrane, and cytoplasm. This summary covers their functions, how to observe them under a microscope, and includes practical activities for hands-on learning. Ideal for students studying cellular biology.
BiologyDiscusses passive and active transports, osmosis, hypo/hypertonic solutions, and things cells have in common.
BiologyCell membrane and its structure including carbohydrates, proteins, and phospholipids
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
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 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 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 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 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
Algebra
Overige
Algebra 1