NCERT Solutions for Class 12 Biology Chapter 7 Evolution
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Download PDFNCERT solutions for class 12 biology chapter 7 evolution: What exactly is evolution? Your search for evolution NCERT ends here as we provide detailed solutions to each chapter of the NCERT Solutions for Class 12 Biology That are in accordance with the most recent CBSE Syllabus 2022–23. 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. What follows is the longest of all the construed and conjectured stories. Solutions of NCERT class 12 biology chapter 7 evolution will help you in understanding the story of the origin of life and 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. The origin of life on earth can be understood only against the background of the origin of the universe, especially earth.
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In CBSE NCERT Solutions for Class 12 biology chapter 7 evolution, you will the easy way to remember the facts. If you are looking for the answers of any other class from 6-12 then NCERT solutions are there for you. The diversity of life forms on earth has been changing over millions of years. In solutions for evolution ncert, you will find questions and solutions based on such facts.
Considering the size of the universe, the earth is indeed a speck. In solutions for evolution ncert , questions are there about the Big Bang Theory. In evolution ncert, you will learn about the Big Bang theory which explains the origin of the universe. It talks of a singular huge explosion unimaginable in physical terms. It will also tell you that the universe expanded and hence, the temperature came down.After going through this chapter which is evolution ncert, you will be able to answer all the questions given at the end of the chapter. And if still confused then evolution ncert pdf is there for you all the time. Also, try to attempt all the questions given in NCERT, and in case, if you have any doubt then refer to evolution class 12 ncert pdf. Here you will get all the answers to those questions which are mentioned in this Evolution chapter and it will help you to score good marks in the 12th board exam as well as other competitive exams.
Also Read, related to evolution NCERT
- NCERT Notes for class 12 biology chapter 7 evolution
- NCERT Exemplar for class 12 biology chapter 7 evolution
NCERT Solutions for Class 12 Biology Chapter 7 Evolution: Solved Exercises Questions
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).
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 |
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 |
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.
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.
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 chapter. 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:
7.1 Origin of Life
7.2 Evolution of Life Forms – A Theory
7.3 What is the Evidence of 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
Highlights of NCERT Solutions for Class 12 Biology Chapter 7 Evolution
class 12 biology chapter 7 NCERT solutions highlights are given below:
- The answers for evolution NCERTare written in the best possible way using simple language that makes solutions of 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.
- Solution content for chapter 7 biology class 12 is derived from the textbook by the subject expert.
- Solutions for evolution NCERT 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 pdf.
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 |
Frequently Asked Question (FAQs) - NCERT Solutions for Class 12 Biology Chapter 7 Evolution
Question: How to download NCERT Solutions for Class 12 Biology Chapter 7 PDF?
Answer:
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.
Question: What are the three types of evolution given in evolution ncert?
Answer:
The three types of evolution:
- divergent evolution
- convergent evolution
- parallel evolution
Question: What are two examples of convergent evolution given in Chapter 7 of NCERT Solutions for Class 12 Biology?
Answer:
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
Question: What are examples of coevolution given in Chapter 7 of NCERT Solutions for Class 12 Biology?
Answer:
These are examples of coevolution given evolution ncert class 12:
- Predator-Prey Coevolution
- Flowering Plants and Pollinators
- Herbivores and plants
- Acacia ants and Acacias
Question: What are the important topics of evolution ncert?
Answer:
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
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Questions related to CBSE Class 12th
i couldnt clear 1st compartment (which held in August 2022) cbse class 12th so can I give improvement in all subjects which to be held on March 2023. tell me a solution i need more than 75% in class 12th
hello,
Yes you can appear for the compartment paper again since CBSE gives three chances to a candidate to clear his/her exams so you still have two more attempts. However, you can appear for your improvement paper for all subjects but you cannot appear for the ones in which you have failed.
I hope this was helpful!
Good Luck
Answer lateri was not able to clear 1st compartment and now I have to give 2nd compartment so can I give improvement exam next year? plz tell me very much tensed(cbse class 12th)
Hello dear,
If you was not able to clear 1st compartment and now you giving second compartment so YES, you can go for your improvement exam next year but if a student receives an improvement, they are given the opportunity to retake the boards as a private candidate the following year, but there are some requirements. First, the student must pass all of their subjects; if they received a compartment in any subject, they must then pass the compartment exam before being eligible for the improvement.
As you can registered yourself as private candidate for giving your improvement exam of 12 standard CBSE(Central Board of Secondary Education).For that you have to wait for a whole year which is bit difficult for you.
Positive side of waiting for whole year is you have a whole year to preparing yourself for your examination. You have no distraction or something which may causes your failure in the exams. In whole year you have to stay focused on your 12 standard examination for doing well in it. By this you get a highest marks as a comparison of others.
Believe in Yourself! You can make anything happen
All the very best.
if i am giving improvement in one subject this year, will i be able to give improvement in more subjects next year?
Hello Student,
I appreciate your Interest in education. See the improvement is not restricted to one subject or multiple subjects and we cannot say if improvement in one subject in one year leads to improvement in more subjects in coming year.
You just need to have a revision of all subjects what you have completed in the school. have a revision and practice of subjects and concepts helps you better.
All the best.
I got an RT for 2 subjects, so do I have to give exams for all the subjects in the coming year or just the 2. pls help me
Hi,
You just need to give the exams for the concerned two subjects in which you have got RT. There is no need to give exam for all of your subjects, you can just fill the form for the two subjects only.
I will have my boards in Feb 2023 (Class 12) and I still havent completed 1 chapter in any subject (Physics, chemistry and maths) , My 11th concepts are not that great but its okish, I wanted to know that If I do start studying from 15th of August Can I get above 85?
If you'll do hard work then by hard work of 6 months you can achieve your goal but you have to start studying for it dont waste your time its a very important year so please dont waste it otherwise you'll regret.
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