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NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation

NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation

Edited By Irshad Anwar | Updated on Sep 18, 2023 09:11 PM IST | #CBSE Class 12th

NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation: According to a survey, more than 1.5 million species have been recorded in the world, but there might be nearly 6 million species on earth that are waiting to be discovered and named, which is a very big thing. The total sum of diversity that exists at all levels of biological organization is referred to as biodiversity. In the solutions for NCERT Class 12 Biology Solutions Chapter 15, you will get questions about the diversity of species. Of the named species, more than 70 per cent are animals, of which the majority are insects. The interesting thing that you will learn in Biodiversity and Conservation Class 12 Solutions is that the group Fungi has more species than all the other vertebrate species. The NCERT Solutions for Class 12 prepared by subject matter experts are offered so that students can benefit the most and learn without hassle for Board exam preparation. Scroll down to go through the questions and answers given in NCERT Solutions for Class 12 Biology Chapter 15.

This Story also Contains
  1. NCERT Solutions For Class 12 Biology Biodiversity and Conservation
  2. NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation
  3. NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Its Conservation
NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation
NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation

Biodiversity and Conservation Class 12 NCERT Solutions have all the answers to topic-wise questions that are asked in the chapter. Species diversity on earth is not uniformly distributed but shows interesting patterns. Class 12 Biology Chapter 15 is curated according to the recent CBSE Syllabus for 2023–24. These Class 12 Biology NCERT Solutions will help students score well in the exams. Biodiversity and Conservation Class 12 Solutions provide explanation in detail with related and representative examples. We have thorough solutions to every chapter of the NCERT Solutions for Class 12 Biology.

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Class 12 Biology Chapter 15 NCERT Solutions are beneficial to enhance the conceptual knowledge of students. Human reproduction Class 12 will also help you understand the concepts and topics for the competitive exams as well. In Biodiversity and Conservation Class 12 NCERT, you will also learn about species richness, which is also a function of the area of a region; the species-area relationship is generally a rectangular hyperbolic function. If you are looking for the answers to any other class from 6–12, then NCERT Solutions are there for you, as it's the easiest way to get all the solutions. As well as Class 12 Biology Chapter 15 question answer can be downloaded.

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NCERT Solutions For Class 12 Biology Biodiversity and Conservation

According to the recent CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 13.

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Also Read: NCERT Exemplar for Class 12 Biology Chapter 15 Biodiversity and Conservation

NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation

Biodiversity and Conservation Class 12 NCERT Solutions are given below:

Class 12 Biology Chapter 15 NCERT Solutions:

Q1. Name the three important components of biodiversity.

Answer:

Biodiversity refers to the vast variety present among the various life forms. The three components of biodiversity are

1. Genetic diversity

2. Species diversity

3. Ecosystem diversity

Q2. How do ecologists estimate the total number of species present in the world?

Answer:

In order to estimate the number of species present on earth, ecologists statistically compare species richness of well-studied group of insects of tropical and temperate regions and these ratios are extrapolated with other groups of plants and animals to estimate the species richness found on Earth. As per estimates, about 7 million species are present on Earth.

Biodiversity and Conservation Class 12 Solutions

Q3. Give three hypotheses for explaining why tropics show greatest levels of species richness.

Answer:

Tropics show the greatest level of species richness due to the following reasons (hypotheses)

1. The climate of tropical areas is more stable as compared to temperate areas. So the local populations, continuously live in the absence of natural disturbances.

2. Tropical communities are highly productive and can support a wide range of other species. This is mainly because tropics receive more solar energy.

3. In tropics, there is warm temperature and high humidity. Such conditions are favourable for a number of varieties of fungi, plants and algae.

Class 12 Biology Chapter 15 NCERT Solutions:

Q4. What is the significance of the slope of regression in a species – area relationship?

Answer:

The slope of regression has a major role in determining the species-area relationship. In smaller areas slope of regression is similar regardless of the taxonomic group or region. On the other hands, in case of larger areas, curve us steeper. Biodiversity also increases from higher to lower altitudes.

Class 12 Biology Chapter 15 Question Answer

Q5. What are the major causes of species losses in a geographical region?

Answer:

The major causes of species losses in a geographical region are as follows;

1. Habitat loss and fragmentation

2. Over-exploitation

3. Alien species invasion\

4. Co-extinction

Class 12 Biodiversity and Conservation NCERT Solutions

Q6. How is biodiversity important for ecosystem functioning?

Answer:

Importance of biodiversity in ecosystem functioning

1. Biodiversity is important for maintaining stability, productivity, resilience, alternative pathways and overall health of a particular ecosystem.

2. A scientist named David Tilman confirmed that higher the biodiversity higher will be the productivity of the ecosystem as more plants are there to photosynthesize and more decomposers are there to recycle the waste of the ecosystem. He also proved that if biodiversity of an area is high than a year to year variation in total biomass will be lesser contributing to the overall stability of an ecosystem.

3. Rich biodiversity provides resilience against natural as well as man-made disturbances.

4. To clarify the importance of rich biodiversity on ecosystem functioning, River Popper hypothesis was proposed by Paul Ehrlich. He cited that the way in an aeroplane all parts are joined by thousands of rivets, in an ecosystem all components are joined by species. As more and more rivets are removed the parts of aeroplane disassemble. Similarly, as species are removed the functioning of the ecosystem also gets affected.

Class 12 Biology Chapter 15 NCERT Solutions

Q7. What are sacred groves? What is their role in conservation?

Answer:

Sacred groves are the traditionally protected patches of forests around places of worship where local tribal communities actively participate to protect these regions and do not allow to cut even a single branch of the tree because of religious reasons. Sacred groves in India are found in Western Ghats of Karnataka, Maharashtra, Khasi and Jaintia hills in Meghalaya, Aravali hills in Rajasthan and Sarguja, Chanda and Bastar areas of Madhya Pradesh.

Role of sacred groves on the conservation of biodiversity

1. Sacred groves help in the protection of a number of rare, endangered and endemic species.

2. In these regions, deforestation is strictly prohibited and thus they are biodiversity-rich areas.

Biodiversity and Conservation Class 12 Solutions:

Q8. Among the ecosystem services are control of floods and soil erosion. How is this achieved by the biotic components of the ecosystem?

Answer:

Ecosystem services refer to good or benefits that we get from the ecosystem. Prevention of soil erosion and floods comes under benefits provided by the ecosystem to us. The ecosystem includes both abiotic and biotic components. The biotic components are the living organisms present in an ecosystem. Biotic components play a role in providing ecosystem services. some of these roles are as follows:

1. The roots of plants hold the soil particles very tightly. This prevents the erosion or degradation of the top layer of soil

2. Plants increase soil fertility and biodiversity.

3. Presence of plants also help in controlling the flow of floods and lead to minimal destructions.

4. roots of plants make the soil porous thus allowing water to seep in the soil.

5. The carbon dioxide and oxygen balance are maintained in the ecosystem via plants and animals.

Class 12 Biology Chapter 15 Question Answer:

Q9. The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification?

Answer:

Animals have achieved greater diversification than animals due to following reasons:

1. Animals possess a nervous system to receive stimuli and show a response against them.

2. Animals are motile and they can avoid competition thus leading to greater diversification.

3. Animals are subjected to less seasonal variations as compared to plants.

Plants are fixed and they require more evolutionary adaptations in order to obtain their requirements of water, minerals, sunlight, avoiding of herbivory etc. Thus, there is higher diversity among animals than plants.

Class 12 Biodiversity and Conservation NCERT Solutions:

Q10. Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

Answer:

Yes, some harmful pathogens i.e. disease-causing organisms with little or no role in the ecosystem can be made to get extinct. Their extinction will not lead to any effect on the ecological balance. These pathogens may include smallpox virus etc, Poliovirus is about to get eradicated. There are efforts to make this world free from diseases such as TB, AIDA, Malaria etc. Since the microorganisms causing these disease have no role to play in the environment, they can be made to get eradicated.

NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Its Conservation

Class 12 Biodiversity and Conservation NCERT Solutions have given a detailed explanation to each answer of the exercise. Biodiversity NCERT conservation is of two types, it can be in situ as well as ex-situ. In in-situ conservation is that conservation in which the endangered species are protected in their natural habitat so that the entire ecosystem can be protected. Whereas, according to Biodiversity and Conservation Class 12 NCERT Solutions, Ex-situ conservation methods include protective maintenance of threatened species in zoological parks and botanical gardens, in vitro fertilization, tissue culture propagation and cryopreservation of gametes. In case you have any doubts or queries about solving questions based on these concepts, then the Solutions for Biology Chapter 15 Class 12 will help you to solve them.

After going through the CBSE NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation, you will be able to understand all the questions and answers given in Biodiversity and Conservation Class 12 NCERT. And if still, you have any doubt or problem in getting the correct answers then NCERT Solutions for Biodiversity NCERT will help you. But don't forget to try Biodiversity NCERT at least once, so that you can answer those questions by yourself. Then check your answers with the help of solutions for NCERT Class 12 Biology Chapter 15 Biodiversity and Conservation. There you will get all the answers in Class 12 Biology NCERT Solutions and it will help you to score good marks not only in 12th Biology board exam as well as also in other competitive exams like NEET.

NCERT Solutions for Class 12 Biology Chapter 15 – The CBSE Syllabus 2023-24 includes a unit on ecology that covers biodiversity and its conservation. The following chapters make up the ecology unit:

  1. Organisms and Population

  2. Ecosystem

  3. Biodiversity and Its Conservation

  4. Environmental Issues

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According to recent exam trends, the Unit - Ecology is worth 14 marks overall. Thus, it is necessary for students to thoroughly understand all concepts and to practice using NCERT Biology Class 12 Solutions, sample papers and previous year's questions. In order to quickly understand difficult concepts, students can use the NCERT Solutions for Class 12 Biology Chapter 15 as a quick reference.

Important Topics of Biodiversity and Conservation Class 12 NCERT Solutions:

Important topics from Class 12 Biology Chapter 15 are given below:

Section Name
Topic Name
15
Biodiversity and Conservation
15.1Biodiversity
15.2Biodiversity Conservation
15.3Summary
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The important Subtopics of NCERT Solutions For Class 12 Biology Biodiversity and Conservation:

  • 15.1.1 How Many Species are there on Earth and How Many in India?
  • 15.1.2 Patterns of Biodiversity
  • 15.1.3 The importance of Species Diversity to the Ecosystem
  • 15.1.4 Loss of Biodiversity
  • 15.2.1 Why Should We Conserve Biodiversity?
  • 15.2.2 How do we conserve Biodiversity?

Highlights of NCERT Solutions Class 12 Biology Chapter 15 – Biodiversity and Its Conservation

The key features of the NCERT Solutions For Class 12 Biology Biodiversity and Conservation:

  • Biodiversity and Conservation NCERT Solutions are written in the best possible way using simple language that makes solutions easier to read and understand
  • In Biodiversity and Conservation Class 12 NCERT Solutions, points are used to frame answers to help understand quickly.
  • Solutions content for Biodiversity NCERT is derived from the textbook by the subject expert.
  • NCERT Solutions For Class 12 Biology Biodiversity and Conservation are as per the latest CBSE Syllabus and guidelines.
  • The solutions PDF for Biology Chapter 15 Class 12 are readily available and easily accessible for free.
  • Important topics are listed in the NCERT Solutions Class 12 Biology Chapter 15.
  • The Ch 15 Biology Class 12 will also help you to prepare for your competitive exams like the NEET
  • Class 12 Biology Ch 15 question answer will also help you in your 12th board exam.
  • Biodiversity and Conservation Class 12 questions and answers are provided in step-wise manner.

NCERT Solutions for Class 12- Subject wise

NCERT solutions for Class 12 Biology

NCERT Exemplar Class 12 Solutions

Also Check NCERT Books and NCERT Syllabus here:

NCERT Solutions for Class 12 Biology- Chapter wise

Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Chapter 14
Chapter 15
Biodiversity and Conservation
Chapter 16


We hope you will ace your board examination with the help of NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation.

Frequently Asked Question (FAQs)

1. What are the important topics of NCERT solutions for class 12 biology chapter 15 biodiversity and conservation?
  • Biodiversity NCERT 
  • How Many Species are there on Earth and How Many in India?  
  • Patterns of Biodiversity  
  • The importance of Species Diversity to the Ecosystem  
  • Loss of Biodiversity  
  • Biodiversity Conservation  
  • Why Should We Conserve Biodiversity?  
  • How do we conserve Biodiversity? 
2. What are the three main components of biodiversity ncert?

The three main components of biodiversity ncert are:  

  1. Genetic diversity

  2. Species diversity  

  3. Ecosystem diversity 

3. Why you should use NCERT solutions for class 12 biology chapter 15 biodiversity and conservation?
  • NCERT is the base of your learning.  
  • You will get all the answers biodiversity ncert and it will help you to score good marks in the exam.  
  • CBSE NCERT solutions for class 12 biology chapter 15 biodiversity and conservation will also help you with competitive exams like NEET.  
  • NCERT solutions for class 12 biology chapter 15 biodiversity and conservation will also help you in your 12th board exam.  
  • Biodiversity and conservation ncert will also boost your knowledge. 
  • To score well in the examination, follow the NCERT syllabus and solve the exercise given in the NCERT Book. To practice more problems, students must refer to NCERT Exemplar.
4. What are the role of sacred groves on the conservation of biodiversity?

  1. Sacred groves help in the protection of a number of rare, endangered and endemic species.  

  2. In these regions, deforestation is strictly prohibited and thus they are biodiversity-rich areas. 

5. How to score well in Chapter 15 of NCERT Solutions for Class 12 Biology?

The NCERT Solutions for Class 12 Biology Chapter 15 lay a solid foundation for the fundamental ideas covered in the chapter. Based on the most recent CBSE marking criteria and weighting, the solutions provided by expert faculty are precise. Students will learn more about the ideas that are crucial for the board exams by consulting these solutions. Students are better able to remember the concepts when they receive precise answers in a systematic format.

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I am interested in graphic designing and coding. how do I make a career .which stream should I go.what engineering subject to take

Hello aspirant,

The purpose of graphic design extends beyond the brand's look. Nevertheless, by conveying what the brand stands for, it significantly aids in the development of a sense of understanding between a company and its audience. The future in the field of graphic designing is very promising.

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Sajal Trivedi 29 January,2024
i couldn't 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

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Upasana Barman 24 August,2022
i 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.

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Mayankjha.student2007 23 August,2022
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.

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Nuthalapati Vyshnavi 21 August,2022
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.

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Muskan Dhalwal 17 August,2022
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0.02

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