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NCERT Solutions for Class 11 Geography - Biodiversity and Conservation

Q1: Multiple choice questions.
(i) Conservation of biodiversity is important for :
(a) Animals
(b) Animals and plants
(c) Plants
(d) All organisms
Ans: (d)

(ii) Threatened species are those which :
(a) threaten others
(b) Lion and tiger
(c) are abundant in number
(d) are suffering from the danger of extinction
Ans: (d)

(iii) National parks and sanctuaries are established for the purpose of :
(a) Recreation
(b) Hunting
(c) Pets
(d) Conservation
Ans: (d)

(iv) Biodiversity is richer in :
(a) Tropical Regions
(b) Polar Regions
(c) Temperate Regions
(d) Oceans
Ans: (a)

(v) In which one of the following countries, the ‘Earth Summit’ was held?
(a) the UK
(b) Mexico
(c) Brazil
(d) China
Ans: (c)

Q2: Answer the following questions in about 30 words.
(i) What is biodiversity?
Ans: Biodiversity refers to the varieties of plants, animals and micro-organisms, the genes they contain and the ecosystems they form.

(ii) What are the different levels of biodiversity?
Ans: There are three different levels of biodiversity:

  • Genetic diversity: It refers to the variation of genes within species.
  • Species diversity: It refers to the variety of species.
  • Ecosystem diversity: It refers to the number of ecosystems in a certain area.

(iii) What do you understand by ‘hotspots’?
Ans: The areas rich in species diversity are called hotspots of diversity.

(iv) Discuss briefly the importance of animals to human kind.
Ans: Animals capture and store energy, produce and decompose organic materials, help to cycle water and nutrients throughout the ecosystem, fix atmospheric gases and help regulate the climate.

(v) What do you understand by ‘exotic species’?
Ans: Species which are not the natural inhabitants of the local habitat but are introduced into the system are called exotic species.

Q3: Answer the following questions in about 150 words.
(i) What are the roles played by biodiversity in the shaping of nature?
Ans: Biodiversity has contributed in many ways to the development of human culture and, in turn, human communities have played a major role in shaping the diversity of nature at the genetic, species and ecological levels. Biodiversity plays the following roles:

  • Ecological Role of Biodiversity: Species capture and store energy, produce and decompose organic materials, help to cycle water and nutrients throughout the ecosystem, fix atmospheric gases and help regulate the climate. These functions are important for ecosystem function and human survival.
  • Economic Role of Biodiversity: Biodiversity is seen as a reservoir of resources to be drawn upon for the manufacture of food, pharmaceutical, and cosmetic products.
  • Scientific Role of Biodiversity: Biodiversity also helps in understanding how life functions and the role of each species in sustaining ecosystems of which we are also a species.

(ii) What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
Ans: The major factors that are responsible for the loss of biodiversity are:

  • Growth in human population has increased the rate of consumption of natural resources which accelerated the loss of species and habitation in different parts of the world.
  • Overexploitation of resources and deforestation.
  • Destruction of natural habitats.
  • Natural calamities such as earthquakes, floods, volcanic eruptions, forest fires, droughts, etc.
  • Pesticides and other pollutants such as hydrocarbons and toxic heavy metals.

The steps which are needed to prevent them are:

  • Efforts should be made to preserve the species that are endangered.
  • Prevention of extinction requires proper planning and management.
  • Varieties of food crops, forage plants, timber trees, livestock, animals and their wild relatives should be preserved.
  • Each country should identify habitats of wild relatives and ensure their protection.
  • Habitats where species feed, breed, rest and nurse their young should be safeguarded and protected.
  • International trade in wild plants and animals be regulated.
The document NCERT Solutions for Class 11 Geography - Biodiversity and Conservation is a part of the UPSC Course Geography for UPSC CSE.
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FAQs on NCERT Solutions for Class 11 Geography - Biodiversity and Conservation

1. What is biodiversity and why is it important for conservation?
Ans. Biodiversity refers to the variety of life forms on Earth, including plants, animals, and microorganisms. It is important for conservation because it contributes to ecosystem stability, provides ecosystem services such as pollination and water purification, and is essential for human well-being.
2. What are the major threats to biodiversity?
Ans. The major threats to biodiversity include habitat destruction, pollution, climate change, invasive species, and overexploitation of natural resources. These factors can lead to the loss of species and disruption of ecosystems.
3. How can individuals contribute to biodiversity conservation?
Ans. Individuals can contribute to biodiversity conservation by reducing their carbon footprint, supporting sustainable agriculture and fishing practices, planting native species in their gardens, and advocating for conservation policies at the local and national levels.
4. What are the different levels of biodiversity conservation?
Ans. Biodiversity conservation can occur at the genetic, species, and ecosystem levels. Genetic conservation focuses on preserving the genetic diversity within a species, species conservation aims to prevent the extinction of individual species, and ecosystem conservation seeks to protect entire ecosystems and the interactions within them.
5. What are some successful examples of biodiversity conservation efforts?
Ans. Some successful examples of biodiversity conservation efforts include the establishment of protected areas such as national parks and wildlife reserves, the implementation of species recovery programs for endangered species, and the promotion of sustainable land use practices that prioritize biodiversity conservation.
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