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

 

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NCERT Solutions for Class 12 Biology Chapter 15 - Biodiversity and Conservation: Biodiversity refers to the sum total of diversity that exists at all levels of biological organization. Of particular importance is the diversity at genetic, species and ecosystem levels and conservation efforts are aimed at protecting diversity at all these levels.

In Chapter 15 - Biodiversity and Conservation of NCERT Class 12 Biology, you will study the diversity of species. More than 1.5 million species have been recorded in the world, but there might still be nearly 6 million species on earth waiting to be discovered and named. Of the named species, > 70 percent are animals, of which 70 percent are insects. The group Fungi has more species than all the vertebrate species combined. India, with about 45,000 species of plants and twice as many species of animals is one of the 12 megadiversity countries of the world.

Biodiversity and Conservation of NCERT Class 12 Biology also include the diversity of species. Species diversity on earth is not uniformly distributed but shows interesting patterns. It is generally highest in the tropics and decreases towards the poles. Important explanations for the species richness of the tropics are: Tropics had more evolutionary time; they provide a relatively constant environment and, they receive more solar energy which contributes to greater productivity. Species richness is also a function of the area of a region; the species-area relationship is generally a rectangular hyperbolic function.

Here are the important topics of Chapter 15 - Biodiversity and Conservation of NCERT Class 12 Biology:

15.1 Biodiversity

    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 Biodiversity Conservation

    15.2.1 Why Should We Conserve Biodiversity?

    15.2.2 How do we conserve Biodiversity?

Chapter 15 - Biodiversity and Conservation of NCERT Class 12 Biology will also tell you about the conservation of biodiversity. Biodiversity conservation may be in situ as well as ex-situ. In in-situ conservation, the endangered species are protected in their natural habitat so that the entire ecosystem is protected. Recently, 34 ‘biodiversity hotspots’ in the world have been proposed for intensive conservation efforts. Of these, three (Western Ghats-Sri Lanka, Himalaya, and Indo-Burma) cover India’s rich biodiversity regions. Our country’s in situ conservation efforts are reflected in its 14 biosphere reserves, 90 national parks, > 450 wildlife sanctuaries, and many sacred groves. 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.

After going through the Biodiversity and Conservation - Chapter 15 line by line, you will be able to answer the questions mentioned below:

  • Q1. Among the ecosystem services are control of floods and soil erosion. How is this achieved by the biotic components of the ecosystem?
  • Q2. The species diversity of plants (22 percent) is much less than that of animals (72 percent). What could be the explanations to how animals achieved greater diversification?
  • Q3. Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

And if still confused or need help in these questions then, Solutions for NCERT Class 12 Biology of Chapter 15 - Biodiversity and Conservation is there for you.

Also, try to attempt all the given questions in NCERT, and in case, if you have any doubt then refer to NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation. There you will get all the answers to this chapter and it will help you to score good marks not only in 12th board exam as well as also in other competitive exams like NEET.

NCERT Solutions for Class 12 Biology Chapter 15 - Biodiversity and Conservation: Solved Exercise Questions

NCERT Solutions class 12 – Biology

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 16

Environmental Issues

 

NCERT Solutions for Class 12- Subject wise

NCERT solutions for Class 12 Biology

NCERT solutions for Class 12 Maths

NCERT solutions for Class 12 Chemistry

NCERT solutions for Class 12 Physics

 

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