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 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.
    Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the newborn infant.


      • 2.
        Describe ‘Ex situ’ approach for conserving biodiversity. Give any two examples.


          • 3.
            Study the items of Column-I and those of Column-II:
            Column-I Column-II
            (a) RNA polymerase I (i) 18s rRNA
            (b) RNA polymerase II (ii) SnRNAs
            (c) RNA polymerase III (iii) hnRNA
            Choose the option that correctly matches the items of Column-I with those of Column-II:

              • (a)-(i), (b)-(ii), (c)-(iii)
              • (a)-(iii), (b)-(ii), (c)-(i)
              • (a)-(ii), (b)-(iii), (c)-(i)
              • (a)-(i), (b)-(iii), (c)-(ii)

            • 4.
              Student to attempt either option (A) or (B):
              (A) Name the Indian crop variety for which, in 1997, an American company got patent rights through the US Patent and Trademark Office. This is considered a case of Biopiracy. Justify.

              OR
              (B) State two purposes for which the Indian Government has set up GEAC (Genetic Engineering Approval Committee).


                • 5.

                  Flowering plants with hermaphrodite flowers have developed many reproductive strategies to ensure cross-pollination. Study the given outbreeding devices adopted by certain flowering plants and answer the questions that follow.

                  Note : All plants belong to the same species. No pollen tube growth/inhibition of pollen germination on stigma. Pollen germination on stigma.

                  • [(a)] Name and define the outbreeding device described in the above table.
                  • [(b)] Explain what would have been the disadvantage to the plant in the absence of the given strategy.


                    • 6.

                      Read the passage given below and answer the question. 
                      Food chains ‘P’ and ‘Q’ form an interconnection. ‘P’ initiates with wheat grass whose population supports a few grasshoppers, frogs and snakes. 
                      ‘Q’ starts with dead decaying leaves of wheat grass which are eaten by earthworms and then food chain is continued with frog of food chain ‘P’. 
                      Identify the types of food chains ‘P’ and ‘Q’:

                        • A

                        • B

                        • C

                        • D

                      CBSE CLASS XII Previous Year Papers

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