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NCERT Solutions for Class 12 Biology Chapter 7 Evolution
Edited By Irshad Anwar | Updated on Sep 14, 2023 09:59 PM IST | #CBSE Class 12th
NCERT Solutions for Class 12 Biology Chapter 7 Evolution: Your search for questions and answers for Evolution NCERT Class 12 ends here, as we provide detailed solutions to each chapter of the NCERT Solutions for Class 12 Biology. These solutions are in accordance with the most recent CBSE Syllabus (2023–24). What exactly is evolution? Go through the Evolution Class 12 Solutions,To understand the changes in flora and fauna that have occurred over millions of years on earth, we must have an understanding of the context of the origin of life, i.e., the evolution of the earth, of stars, and indeed of the universe itself. Solutions for NCERT Class 12 Biology Chapter 7 Evolution will help you understand the story of the origin of life and the evolution of life forms or biodiversity on planet earth in the context of the evolution of earth and against the background of the evolution of the universe itself. keeping reading to learn more about NCERT Solutions for Class 12 Biology Chapter 7 Evolution.
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In CBSE NCERT Solutions for Class 12 Biology, Chapter 7, Evolution, you will find an easy way to remember the facts. The diversity of life forms on earth has been changing over millions of years. In the solutions of Evolution NCERT, you will find questions and answers based on such facts. The origin of life on earth can only be understood against the background of the origin of the universe, especially the earth. Considering the size of the universe, the earth is indeed a speck. Class 12 Biology Chapter 7 NCERT Solutions will also tell you that the universe expanded, and hence, the temperature came down.
Chapter 7 Biology Class 12 NCERT Solutions, provide questions and explanation about the Big Bang Theory. In evolution, you will learn about the Big Bang theory, which explains the origin of the universe. Evolution Class 12 NCERT Solutions talks of a singular, huge explosion unimaginable in physical terms. After going through Biology Chapter 7 Class 12, which is evolution, you will be able to answer all the questions given at the end of the chapter. And if you're still confused, then the Evolution NCERT PDF is there for you all the time. Also, try to attempt all the questions given in NCERT, and in case you have any doubt, refer to the Evolution Class 12 NCERT PDF. Here you will get all the answers to those questions that are mentioned in this Evolution chapter, which will help you score well in the 12th board exam as well as other competitive exams. If you are looking for the answers to any other class from 6–12, then NCERT Solutions are there for you.
NCERT Solutions For Class 12 Biology Evolution
Also Read, related to the evolution NCERT
- NCERT Notes for class 12 biology chapter 7 evolution
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Download EBookNCERT Solutions for Class 12 Biology Chapter 7: Evolution (Solved Textbook Exercise)
Evolution Class 12 Questions and Answers:
Q 1. Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
Answer:
Darwinian selection theory suggests that the environment selects organisms with useful variation over those which do not have useful variations. It is mainly because, in a dynamic environment, these organisms are better adapted to survive. A well-defined example for Darwin's theory is antibiotic resistance in bacteria. When bacteria were grown on penicillin containing agar medium, all the bacteria died, however, the ones having variations conferring penicillin resistance survived. Later, these bacteria multiplied and increased their number. As a result of this, penicillin-resistant bacteria evolved and survived because of the environment that selected these over the others.
Answer:
A recent study suggests Ledumahadi mafube is the fossil from South Africa, that marked the beginning of gigantic dinosaurs. This 200 million-year-old dinosaur weighed around 12 tons, making it the earliest dinosaur to pass beyond the 10-ton threshold. Later, dinosaurs would become even bigger. But in its time, Ledumahadi mafube was a giant among dwarfs (Source- Business standard).
Class 12 Evolution NCERT Solutions:
Q3. Attempt giving a clear definition of the term species. .
Answer:
The term species refers to a group of individuals that are similar in their characters and can interbreed among themselves and produce viable and fertile progenies.
Answer:
The various components of human evolution involve the age of appearance, brain capacity, posture, locomotion, height, body hairs, dietary preferences, skeletal structure, cranium structure etc. A summary of human evolution based on these components is as follows:
Name of the Organisms | Brain capacity in cm | Posture | Dietary preferences | Some other features | |
1. | Dryopithecus | not known | Bent, ape-like | Soft fruits and leaves | Equal sized arms and legs, large canines |
2. | Ramapithecus | not known | Semi-erect, more man-like | seeds and nuts | Large molars, small canines |
3. | Australopithecus | 500 | Fully erect | Herbivorous | Small canines, hunted with stones |
5. | Homo habilis | 650-800 | Fully erect | Carnivorous | Toolmakers with small canines |
6. | Homo erectus | 900 | Fully erect | Omnivorous | Used tools made of stones and bones |
7. | Homo neanderthalnsis | 1400 | Fully erect | Omnivorous | Cave dwellers used to hide their bodies |
8. | Homo sapiens | 1200-1600 | Fully erect | Omnivorous | Highly intelligent, social |
Class 12 Biology Chapter 7 NCERT Solutions:
Answer:
Self-consciousness is the awareness of an animal towards its surroundings. Other than man, the animals which show self-consciousness are dolphins, orangutans, gorilla, chimps, elephants etc. Even dogs also show subtle consciousness.
Answer:
Some modern animals and fossils to which they can be linked are as follows:
Name of the animal | Name of the fossils | |
1. | Man | Ramapithecus |
2. | Giraffe | Palaeotragus |
3. | Tetrapods | Ichthyostega |
4. | Fish | Arandaspis |
5. | Dog | Leptocyon |
6. | Horse | Eohippus |
7. | Whale | Protocetus |
8. | Bat | Archaeonycteris |
9. | Elephant | Moerithers |
10. | Camel | Protylopus |
Class 12 Biology Chapter 7 Question Answer:
Q7. Practise drawing various animals and plants.
Answer:
With the help of your teachers try drawing various plants and animals. While drawing, you can draw comparisons between different structures of animals and plants.
Note- The answer to this question varies according to the students.
Q8. Describe one example of adaptive radiation.
Answer:
Adaptive radiation refers to the process in which the individuals belonging to a rapidly diversifying group, diverge from their lineage to form new species. Adaptive radiation works on the theory of natural selection. One example of adaptive radiation is Darwin's finches of Galapagos island. These finches were formed from a single diversifying species that came on this geographical region accidentally. The new species diversified and got adapted to the conditions present on this habitat. The different finches developed different eating habits and accordingly developed different beak structures. This further led to their evolution through adaptive radiation.
Class 12 Biology Ch 7 Question Answer:
Q9. Can we call human evolution as adaptive radiation?
Answer:
No, human evolution cannot be called adaptive radiation because, in adaptive radiation, a single species diversifies into new different species, however, in case of human evolution, the gradual evolution of a single species occurred with time.
Answer:
The evolutionary stages of a horse are as follows:
Period | Name of the evolutionary stage | Features of the animal |
Eocene | Eohippus | It has 4 toes, all of them are functional. Head and neck are short |
Oligocene | Mesohippus | A slight increase in height with 3 toes on each foot |
Miocene | Merychippus | It was 100 cm tall with 3 toes on each foot. Molars were present |
Pliocene | Pliohippus | It had a single functional toe with a splint in 2 and 4 of each limb. They are 108 cm tall. |
Pleistocene | Eqqus | They have one tow in each foot. For grinding they have molars, and for cutting they have incisors |
NCERT Solutions for Class 12 Biology Chapter 7 – Evolution
Evolution is covered in the Unit - Genetics and Evolution of the NCERT Solutions for Class 12 Biology. According to historical patterns, the genetics and evolution unit receives around 18 marks. In other words, approximately 25% of the exam's questions come from this unit. For students, seeing the chapter's overall weight serves as an eye-opener about its significance. Therefore, in order to be prepared for any type of question that might appear in the exam, all topics must be thoroughly understood and regularly reviewed from the Class 12 Biology Chapter 7 NCERT Solutions.
Evolutionary biology deals with the study of the evolution of life on Earth. Evidence for evolution can be found in the study of fossils, comparative anatomy, and associated biochemistry. The concept of life's origin is outlined in the Biology Chapter 7 Class 12. It provides an overview of the theoretical aspects of life's evolution. The various concepts covered are presented to the students, along with adaptive radiation and biological evolution in Chapter 7 Biology Class 12 NCERT Solutions.
Important topics of NCERT Solutions for Class 12 Biology Chapter 7 Evolution:
Topics and Subtopics in NCERT Solutions for Class 12 Biology Chapter 7 Evolution:
Section | Topic Name |
7 | Evolution |
| 7.1 | Origin of Life |
| 7.2 | Evolution of Life Forms – A Theory |
| 7.3 | What are the Evidences for Evolution? |
| 7.4 | What is Adaptive Radiation? |
| 7.5 | Biological Evolution |
| 7.6 | Mechanism of Evolution |
| 7.7 | Hardy – Weinberg Principle |
| 7.8 | A Brief Account of Evolution |
| 7.9 | Origin and Evolution of Man |
| 7.10 | Summary |
JEE Main Important Mathematics Formulas
As per latest 2024 syllabus. Maths formulas, equations, & theorems of class 11 & 12th chapters
Highlights of NCERT Solutions for Class 12 Biology Chapter 7 Evolution
Class 12 Biology Chapter 7 NCERT Solutions key features are listed below:
- The questions and answers for evolution NCERT are written in the best possible way using simple language that makes solutions in the Evolution Class 12 NCERT PDF easier to read and understand
- In chapter 7 biology Class 12 NCERT solutions,points are used to frame answers to help understand quickly.
- The solution content for Evolution Class 12 questions and answers is derived from the textbook by the subject expert.
- Evolution Class 12 Solutions are as per the latest CBSE Syllabus and guidelines.
- Genetics and evolution NCERT PDF download links are readily available and easily accessible for free.
- Important topics are listed in the evolution Class 12 NCERT solutions.
Also Check NCERT Books and NCERT Syllabus here:
- NCERT Books Class 12 Biology
- NCERT Syllabus Class 12 Biology
- NCERT Books Class 12
- NCERT Syllabus Class 12
NCERT Solutions for Class 12 Biology: Chapter-wise
| Chapter 1 | Reproduction in organisms |
| Chapter 2 | Sexual Reproduction in Flowering Plants |
| Chapter 3 | Human Reproduction |
| Chapter 4 | Reproductive Health |
| Chapter 5 | Principles of Inheritance and Variation |
| Chapter 6 | Molecular basis of inheritance |
| Chapter 7 | Evolution |
| Chapter 8 | Human Health and Disease |
| Chapter 9 | Strategies for Enhancement in Food Production |
| Chapter 10 | Microbes in Human Welfare |
| Chapter 11 | Biotechnology: Principles and Processes |
| Chapter 12 | Biotechnology and its Applications |
| Chapter 13 | Organisms and Populations |
| Chapter 14 | Ecosystem |
| Chapter 15 | Biodiversity and Conservation |
| Chapter 16 | Environmental Issues |
NCERT Solutions for Class 12 - Subject wise:
| NCERT solutions for Class 12 Maths |
| NCERT solutions for Class 12 Chemistry |
| NCERT solutions for Class 12 Biology |
| NCERT solutions for Class 12 Physics |
NCERT Exemplar Class 12 Solutions
| NCERT Exemplar Class 12 Chemistry Solutions |
| NCERT Exemplar Class 12 Mathematics Solutions |
| NCERT Exemplar Class 12 Biology Solutions |
| NCERT Exemplar Class 12 Physics Solutions |
We hope Class 12 students will ace your Board examinations with the help of NCERT Solutions for Class 12 Biology Chapter 7 Evolution.
Frequently Asked Question (FAQs)
1. What are the important topics of evolution ncert?
The important topics of evolution ncert class 12 are:
- Origin of Life
- Evolution of Life Forms – A Theory
- What are the Evidences for Evolution?
- What is Adaptive Radiation?
- Biological Evolution
- Mechanism of Evolution
- Hardy-Weinberg Principle
- A Brief Account of Evolution
- Origin and Evolution of Man
2. What are examples of coevolution given in Chapter 7 of NCERT Solutions for Class 12 Biology?
These are examples of coevolution given evolution ncert class 12:
- Predator-Prey Coevolution
- Flowering Plants and Pollinators
- Herbivores and plants
- Acacia ants and Acacias
3. What are two examples of convergent evolution given in Chapter 7 of NCERT Solutions for Class 12 Biology?
Chapter 7 of NCERT Solutions for Class 12 Biology explains the following two examples of convergent evolution:
- echolocation in whales and bats
- the silk-producing ability of spiders and silk moths
4. What are the three types of evolution given in evolution ncert?
The three types of evolution:
- divergent evolution
- convergent evolution
- parallel evolution
5. How to download NCERT Solutions for Class 12 Biology Chapter 7 PDF?
To download class 12 Biology evolution ncert pdf, students can use the online webpage to pdf converter tools. To Score Well in the examination, follow NCERT Solutions, NCERT syllabus and exercise given in the NCERT Book. To practice more problems, students can refer to NCERT exemplar.
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5 min ⋆ Jul 05, 2024 12:07 PM ISTQuestions related to CBSE Class 12th
Have a question related to CBSE Class 12th ?
hello mahima,
If you have uploaded screenshot of your 12th board result taken from CBSE official website,there won,t be a problem with that.If the screenshot that you have uploaded is clear and legible. It should display your name, roll number, marks obtained, and any other relevant details in a readable forma.ALSO, the screenshot clearly show it is from the official CBSE results portal.
hope this helps.
Ashvadha 12 July,2024
Hello Akash,
If you are looking for important questions of class 12th then I would like to suggest you to go with previous year questions of that particular board. You can go with last 5-10 years of PYQs so and after going through all the questions you will have a clear idea about the type and level of questions that are being asked and it will help you to boost your class 12th board preparation.
You can get the Previous Year Questions (PYQs) on the official website of the respective board.
I hope this answer helps you. If you have more queries then feel free to share your questions with us we will be happy to assist you.
Thank you and wishing you all the best for your bright future.
kumardurgesh1802 10 July,2024
Hello student,
If you are planning to appear again for class 12th board exam with PCMB as a private candidate here is the right information you need:
- No school admission needed! Register directly with CBSE. (But if you want to attend the school then you can take admission in any private school of your choice but it will be waste of money)
- You have to appear for the 2025 12th board exams.
- Registration for class 12th board exam starts around September 2024 (check CBSE website for exact dates).
- Aim to register before late October to avoid extra fees.
- Schools might not offer classes for private students, so focus on self-study or coaching.
Remember
, these are tentative dates based on last year. Keep an eye on the CBSE website ( https://www.cbse.gov.in/ ) for the accurate and official announcement.
I hope this answer helps you. If you have more queries then feel free to share your questions with us, we will be happy to help you.
Good luck with your studies!
kumardurgesh1802 10 July,2024
Hello Aspirant , Hope your doing great . As per your query , your eligible for JEE mains in the year of 2025 , Every candidate can appear for the JEE Main exam 6 times over three consecutive years . The JEE Main exam is held two times every year, in January and April.
satyamercedes0626 23 July,2024
Hi there,
Hope you are doing fine
Yes you are certainly eligible for giving the jee exam in the year 2025. You must pass the maths exam with at least 75% criteria as required by jee and provide the marksheet and the passing certificate while registering for the exam.
Pursuing maths as an additional subject while taking biology as your main subject does not offer any hindrance in you appearing for the jee examination. It is indeed an privilege to pursue both maths and biology as the subjects and prepare for the same.
There will be no issue in filling the form while registering for the exam as it will only require your basic details and marksheet which you can provide by attaching the marksheet of maths also. Also, a detailed roadmap is also available on the official websites on how to fill the registration form. So you can fill the form easily.
Hope this resolves your query.
Abhishek 12 July,2024
Popular CBSE Class 12th Questions
A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is
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An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range
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A particle is projected at 600 to the horizontal with a kinetic energy . The kinetic energy at the highest point
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In the reaction,
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How many moles of magnesium phosphate, will contain 0.25 mole of oxygen atoms?
| Option 1)
0.02 |
Option 2)
3.125 × 10-2 |
| Option 3)
1.25 × 10-2 |
Option 4)
2.5 × 10-2 |
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