NCERT Solutions for Class 12 Biology Chapter 6 Evolution
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The NCERT Solutions for Class 12 Biology Chapter 6 Evolution explains how the origin of life occurs. This was a special event in the universe, leading to the development of all living things, including humans. One experiment discussed is the Miller-Urey experiment, which shows how life started. The Evolution chapter also explains how scientists use fossils, body structures, embryos, and genetic information as evidence. Subject experts prepared the NCERT solutions in a step-by-step manner to help students understand each concept clearly.
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This Story also Contains
- Download Evolution NCERT Solutions PDF
- Access the Class 12 Biology Chapter 6 Evolution Solutions (Exercise Questions)
- Approach to Solve Evolution Class 12 Question Answer
- Important Question of NCERT Class 12 Biology Chapter 6
- What Students Learn from Evolution NCERT Solutions
- What Extra Should Students Study Beyond the NCERT for NEET?
- NCERT Solutions for Class 12 Biology- Chapter-wise
The Evolution Class 12 question answer provides knowledge about how life began billions of years ago. Difficult topics like natural selection, adaptive radiation, and the Hardy-Weinberg principle are explained with examples. The NCERT Solutions for Class 12 are one of the most effective resources for self-study. They help students build strong conceptual clarity and prepare with confidence for exams.
Download Evolution NCERT Solutions PDF
The free PDF for the Evolution chapter is given below. Going through the Class 12 Biology Chapter 6 Evolution question answer gives students a clear understanding of how life evolves.
Also read, related to the evolution, NCERT
Access the Class 12 Biology Chapter 6 Evolution Solutions (Exercise Questions)
From here, students can access detailed solutions for the questions given in the textbook. By referring to the Class 12 Biology Chapter 6 Evolution question answer, prepared as per the NCERT curriculum, they can easily understand the different theories and concepts related to evolution.
Question 1. Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
Answer:
Darwinian selection theory indicates that organisms with variations have high chances of surviving and reproducing in a changing environment. A classic example of this can be seen with antibiotic resistance in bacteria. In this experiment, bacteria grown in an environment containing penicillin were mostly killed, but those with genetic variations survived. These surviving bacteria then multiplied and reproduced, passing down their resistance genes. As time passed, the population evolved to be more resistant to penicillin, indicating how environmental factors can influence evolutionary outcomes.
Answer:
In September 2015, in the newspapers, we heard the discovery of 100-million-year-old pieces of a skeleton of Homo Naledi.
Homo Naledi discovered by a team led by Lee Berger.
It is said that the fossil filled a gap in the early evolution of man, and it is believed that this human ancestor died.
Question 3. Attempt to give a clear definition of the term species.
Answer:
A species represents the lowest taxonomic group that has similar structural and functional features and is capable of breeding true among themselves.
A species consists of all individuals that share a common gene pool.
The study of these species plays an important role in evolutionary research, ecology, and conservation biology.
Answer:
There are several components associated with human evolution, such as brain size, function, skeletal structure, diet, posture, etc.
Below is the table of different features:
Genus/species | Brain size | Posture | Diet | Features |
Dryopithecus | - | Knuckle walker | Soft fruits and leaves | Frontally broadened jaws, large canines, arms, and legs of equal size |
Ramapithecus | - | Semi-erect posture | Seeds and nuts | Small and delicate jaws, small canines, and flattened molars |
Australopithecus afarensis | 400–500 cm3 | Fully erect | Fruits and leaves (herbivores) | Large jaws, small canines, and incisors lived in caves |
Homo habilis(Handyman) | 680cm3 | Fully erect, around 1.5m tall | Carnivorous | Jaws are lightly built, with small canines, and capable of making tools of stone |
Homo erectus | 900cm3 | Fully erect, around 1.5m tall | omnivorous | Large canines make use of fire for hunting and cooking, and live in caves |
Homo sapiens neanderthalensis | 1450cm3 | 1.5 m tall, heavily built | omnivorous | Heavy jaw and small canines bury their dead bodies |
Homo sapiens fossilis | 1660cm3 | Completely erect,1.5m tall | omnivorous | Shorter skulls and reduced jaws lived in caves and made cave paintings. |
Homo sapiens sapiens | 1200cm3 to 1600cm3 | Completely erect, posture, around 1.8m tall | omnivorous | Possessing high intelligence, developed language, speech, and the cultivation of crops were observed. |
Answer:
Self-consciousness is an acute sense of self-awareness. Several animals are self-aware and are of great intelligence, like dolphins. All great apes(orangutans, gorillas, and chimpanzees) and elephants are examples that can evaluate their knowledge and work according to situations.
Answer:
Some modern animals and fossils to which they can be linked are as follows:
Name of the animal | Name of the fossils | |
1. | Human(Homo sapiens) | Ramapithecus |
2. | Giraffe | Palaeotragus |
3. | Tetrapods | Ichthyostega |
4. | Fish | Arandaspis |
5. | Dog | Leptocyon |
6. | Horse | Eohippus |
7. | Whale | Protocetus |
8. | Bat | Archaeonycteris |
9. | Elephant | Moeritherium |
10. | Camel | Protylopus |
Question 7. Practice drawing various animals and plants.
Answer:
By practicing the various plants and animals, you can understand the main characteristics of that species. Students can take the help of teachers and parents to gain more suggestions about the labelled drawings.
A well-labelled diagram of a frog is given below:
A well-labelled diagram of a flowering plant is given below:
Question 8. Describe one example of adaptive radiation.
Answer:
The process of evolution of different species in a given geographical area, starting from a point and radiating to other areas of geography, is called adaptive radiation.
Darwin’s finches represent one of the best examples of this phenomenon. From the original seed-eating features, many other forms with different beak structures and different food habits, such as herbivores and carnivores, have evolved.
Several marsupials, each different from the other, evolved from an ancestral stock, but all within the Australian Island continent.
Question 9. Can we call human evolution adaptive radiation?
Answer:
The evolution of man is an example of directional evolution and not an example of adaptive radiation, as adaptive radiation is the process of diversification of species starting from one point at a particular time and then radiating to other areas of habitats. Darwin’s finches are the best example of adaptive radiation, as is the phenomenon of Australian marsupials. Diversification, which is the main characteristic of adaptive radiation, is not a part of human evolution.
Answer:
There are 5 evolutionary stages of horses, which are given below:
Period | Name of the evolutionary stage | Features of the animal |
Eocene | Eohippus | 4 digits in forelimbs, the size of a fox, lived on soft ground |
Oligocene | Mesohippus | 3 digits in toes, live in dry conditions |
Miocene | Merychippus | It was 100 cm tall with 3 toes on each foot, taller with a longer neck |
Pliocene | Pliohippus | It had a single functional toe and was about 108 cm tall. |
Pleistocene | Equus | They have one toe on each foot. Premolars replaced by molars, well adapted for running. |
NCERT Solutions for Class 12- Subject-wise
- NCERT Solutions for Class 12 Maths
- NCERT Solutions for Class 12 Chemistry
- NCERT Solutions for Class 12 Physics
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Download EBookApproach to Solve Evolution Class 12 Question Answer
Provided below are a few steps that students can follow to answer the questions of the Evolution chapter easily.
Firstly, it's important to go through the NCERT textbook line by line. Most of the questions directly come from this in the exam.
Understand theories of Lamarckism, Darwinism, natural selection, Genetic Drift, and the Hardy-Weinberg principle.
Try to understand the concepts by taking the help of examples like the giraffe (Lamarck), etc. These are well explained in the Class 12 Biology Chapter 6 Evolution question answer.
Make the flow charts to learn the sequence of the origin of humans and their features. Students can also take help from the Class 12 Biology Chapter 6 Evolution Solutions.
- Students are advised to solve the questions given in the NCERT Solutions for Class 12 Biology. This makes students familiar with the question pattern and improves problem-solving skills.
Also, check the NCERT Books and the NCERT Syllabus here:
Important Question of NCERT Class 12 Biology Chapter 6
Evolution covers some of the most important concepts in understanding how life on Earth has changed over time. Given below is an important question that can guide students. For more such questions, students can rely on the NCERT Solutions for Class 12 Biology Chapter 6 Evolution.
Question: Given below are some stages of human evolution.
Arrange them in the correct sequence. (Past to Recent)
A. Homo habilis
B. Homo sapiens
C. Homo neanderthalensis
D. Homo erectus
Choose the correct sequence of human evolution from the options given below:
1. D-A-C-B
2. B-A-D-C
3. C-B-D-A
4. A-D-C-B
Answer: The correct answer is Option 4), A-D-C-B
Explanation:
The right sequence of human evolution is Homo habilis, then Homo erectus, then Homo neanderthalensis, and finally Homo sapiens. Homo habilis was the first human who used tools, while Homo erectus demonstrated a more efficient gait and a larger brain.
NCERT Exemplar Class 12 Solutions
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CBSE Class 12th Syllabus: Subjects & Chapters
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What Students Learn from Evolution NCERT Solutions
The chapter on evolution helps students understand how life originated over millions of years. It explains the evidence, mechanisms, and theories that form the foundation of evolutionary biology.
Students learn about the process of evolution and key experiments like Miller’s that explained the origin of life.
The Evolution NCERT Solutions explain Darwin’s theory of natural selection, Lamarckism, and the mutation theory in simple steps.
Learners explore different evidence of evolution, including homologous organs, analogous organs, fossils, and embryological studies.
Through the Evolution Class 12 question answer, students get a clear idea of concepts like adaptive radiation, speciation, genetic drift, and Hardy-Weinberg equilibrium.
The solutions also help students understand the evolutionary history of humans and how modern humans evolved through different stages.
What Extra Should Students Study Beyond the NCERT for NEET?
Going beyond the NCERT syllabus can provide you with extra help in NEET. It helps students cover areas that may not be included in the textbook but are still important for the exam. To practice diagrams, students can use the NCERT Solutions for Class 12 Biology Chapter 6 Evolution.
NCERT Solutions for Class 12 Biology- Chapter-wise
Given below are the chapter-wise links:
Frequently Asked Questions (FAQs)
Q: What are the important topics of evolution ncert?
A:
The important topics of the NCERT Solutions for Class 12 Biology Chapter 6 Evolution 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
Q: What is the Hardy-Weinberg principle in Class 12 Biology Chapter 6?
A:
The Hardy-Weinberg principle provides a simple mathematical model of how genetic equilibrium is maintained in a gene pool.
- Gene Flow
- Genetic Drift
- Genetic Recombination
- Mutation
- Natural Selection
Q: How do fossils provide evidence of evolution?
A:
Fossils are relics of former living plants or animals that are embedded in the dugout of rock in past geological periods. They are mostly found in sedimentary rocks.
Fossil records provide a complete history of certain organisms that indicate that evolution has taken place for several years.
Q: What is the role of genetic drift in evolution?
A:
Genetic drift describes changes in gene frequency, and these changes are due to events that are unrelated to the inherited traits. Genetic drift tends to reduce the amount of genetic variation within the population, mainly as a result of the loss of alleles, and thus plays an important role in evolution.
Q: How does Darwin’s theory explain evolution in Class 12 Biology?
A:
Darwin’s theory of natural selection is based on the following five fundamental principles:
Enormous fertility in living beings
Struggle for existence
Variations under nature
Natural selection or survival of the fittest
Origin of species
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Taking a drop year to reappear for the Karnataka Common Entrance Test (KCET) is a well-defined process. As a repeater, you are fully eligible to take the exam again to improve your score and secure a better rank for admissions.
The main procedure involves submitting a new application for the KCET through the official Karnataka Examinations Authority (KEA) website when registrations open for the next academic session. You must pay the required application fee and complete all formalities just like any other candidate. A significant advantage for you is that you do not need to retake your 12th board exams. Your previously secured board marks in the qualifying subjects will be used again. Your new KCET rank will be calculated by combining these existing board marks with your new score from the KCET exam. Therefore, your entire focus during this year should be on preparing thoroughly for the KCET to achieve a higher score.
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Yes, you can switch from Science in Karnataka State Board to Commerce in CBSE for 12th. You will need a Transfer Certificate from your current school and meet the CBSE school’s admission requirements. Since you haven’t studied Commerce subjects like Accountancy, Economics, and Business Studies, you may need to catch up before or during 12th. Not all CBSE schools accept direct admission to 12th from another board, so some may ask you to join Class 11 first. Make sure to check the school’s rules and plan your subject preparation.
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For the 12th CBSE Hindi Medium board exam, important questions usually come from core chapters like “Madhushala”, “Jhansi ki Rani”, and “Bharat ki Khoj”.
Questions often include essay writing, letter writing, and comprehension passages. Grammar topics like Tenses, Voice Change, and Direct-Indirect Speech are frequently asked.
Students should practice poetry questions on themes and meanings. Important questions also cover summary writing and translation from Hindi to English or vice versa.
Previous years’ question papers help identify commonly asked questions.
Focus on writing practice to improve handwriting and presentation. Time management during exams is key to answering all questions effectively.
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?
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0.02 |
Option 2)
3.125 × 10-2 |
| Option 3)
1.25 × 10-2 |
Option 4)
2.5 × 10-2 |
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