NCERT Solutions for class 12 biology chapter 15:  Biodiversity and Conservation

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Jasmine Grover

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NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation are provided in this article. It covers all the important definitions, concepts, and methodologies that will be really beneficial for the students appearing for CBSE Class 12 Exam 2022-23. The important topics that are included in this chapter are:

Expected no. of Questions: 1-2 questions of around 4 marks.

Download PDF: NCERT Solutions for Class 12 biology chapter 15 Biodiversity and Conservation


NCERT Solutions for Class 12 Biology Chapter 15

NCERT Solutions

NCERT Solutions

NCERT Solutions

NCERT Solutions

NCERT Solutions


Class 12 Biology Chapter 15 Biodiversity and Conservation: Important Topics

Biodiversity conservation is referred to as the protection, upliftment, as well as management of biodiversity, deriving sustainable benefits for present and future generations. In other words, it is the protection and management of biodiversity in order to obtain resources for sustainable development. Biodiversity is the variability of life on earth, which can be conserved in the following ways: In-situ Conservation and Ex-situ Conservation.

Biodiversity conservation consists of three main objectives:

  • To preserve the diversity of species
  • Sustainable utilization of species and ecosystem
  • To maintain life-supporting systems and essential ecological processes
  • Loss of Biodiversity

Biodiversity loss is the decline or disappearance of biological diversity, or the local reduction or loss of species in a certain habitat, leading to the loss of biological diversity. The term biodiversity or biological diversity refers to the number of genes, species, and individual organisms within a given species within a defined geographic area, ranging from the smallest ecosystem to the global biosphere.


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CBSE CLASS XII Related Questions

  • 1.
    Cow dung and water are mixed and fed into a biogas plant to allow digestion of biowastes. The person performing this process says that there is no need to provide an inoculum.
    Do you agree with him? Justify your answer.
    What happens to the biowaste inside the digester ?
    (c) Name the useful by-products obtained from this process and mention how they are used.


      • 2.
        What is the carrying capacity of a species in a habitat?
        Explain the growth curve that takes this capacity into account.


          • 3.
            Draw a neat diagram of a maize grain showing the internal structure and label any five parts.


              • 4.
                Draw a labelled two-celled structure of male gametophyte of an angiosperm.
                Name the three layers that surround the cytoplasm of a male gametophyte starting from innermost to outermost layer.
                (iii) Which organic material makes the outermost layer? Mention its advantage.
                (iv) Why is the outermost layer of male gametophyte not continuous ?


                  • 5.
                    Read the following passage and answer the questions that follow:
                    India is one of the megadiverse countries housing around 8·1 per cent of global species diversity, although its land area is only 2·4 per cent of the world’s land area. Many of the species are highly threatened due to human activities like deforestation, mining and habitat fragmentation. Laws like Wildlife (Protection) Act, 1972 were enacted by the Government of India to preserve our biological wealth. Various conservation measures are being implemented to save the threatened species. The following bar graph shows the number of species conserved under different biodiversity conservation methods.

                    Which other methods shown in the diagram are opposite to the one identified by you in question ? How are these two conservation approaches different?
                    (c) Write two features of Biodiversity hotspots.
                    (c) To which category do sacred groves belong and how do they help in bio-conservation?


                      • 6.
                        Describe the series of experiments conducted by Frederick Griffith. Comment on the significance of the result obtained.
                        State the contribution of Avery, MacLeod and McCarty.

                          CBSE CLASS XII Previous Year Papers

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