Class 11 Geography Chapter 16 Biodiversity And Conservation

Class 11 Geography Chapter 16 Biodiversity And Conservation The answer to each chapter is provided in the list so that you can easily browse throughout different chapters SCERT Class 11 Geography Chapter 16 Biodiversity And Conservation and select need one.

Class 11 Geography Chapter 16 Biodiversity And Conservation

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Also, you can read the SCERT book online in these sections Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. These solutions are part of SCERT All Subject Solutions. Here we have given Assam Board/NCERT Class 11 Geography Chapter 16 Biodiversity And Conservation Solutions for All Subject, You can practice these here…

Biodiversity And Conservation

Chapter: 16

PART-1

GEOGRAPHY

TEXTUAL QUESTION & ANSWER

Q.1. Conservation of biodiversity is important for-

(i) Animals

(ii) Animals and plants 

(iii) Plants 

(iv) All organisms

Ans: (iv) All organisms.

Q.2. Threatened species are those which – 

(i) Threaten others

(ii) Lion and tiger 

(iii) Are abundant in number

(iv) Are suffering from the danger of extinction

Ans: (iv) Are suffering from the danger of extinction

Q.3. National parks and sanctuaries are established for the purpose of- 

(i) Recreation

(ii) Hunting

(iii)  pets 

(iv)  Conservation

Ans: (iv)  Conservation.

Q.4. Biodiversity is richer in- 

(i)  Tropical Regions

(ii) Polar regions 

(iii) Temperate Regions

(iv) Oceans

Ans: (i)  Tropical Regions.

Q.5.In Which one of the following countries,the earth Summit was held?

(i) The UK

(ii) Mexico

(iii) Brazil

(iv) China

Ans: (iii) Brazil

Answer the following questions in about 30 words

Q.1.What is biodiversity? 

Ans: The diversity of different species, genetic variability among individuals within each species and variety of ecosystems is referred to as biodiversity.

Q.2. What are the different levels of biodiversity? 

Ans: The different levels of biodiversity are: (a) Genetic diversity: It refers to the variation of genes within species. Genetic diversity is essential for a healthy breeding of the population of species.

(b) Species diversity: Species diversity refers to the variety of species. It relates to the number of species in a defined area. 

(c) Ecosystem diversity:  The diversity of habitats and ecological processes occurring within each ecosystem type constitute the ecosystem diversity.

Q.3.What  do you understand by hotspots? 

Ans: All the areas of the earth are not rich in different species.Some areas are more rich in species while some areas are very poor. The areas which are rich in species diversity are called hotspots.

Q.4. Discuss briefly the importance of animals to the human kind.

Ans: The importance of animals to the human kind cannot be measured, due to the following contributions:

(a) They produce and decompose organic materials.

(b) They help to cycle water and nutrients throughout 

the ecosystem.

Q.5. What do you understand by ‘ exotic species’? 

Ans: The species which are not the natural inhabitants of the local habitat but are introduced into the system, are called exotic species.

(c) Answer the following questions in about 150 words. 

Q.1. 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.

The following roles played by biodiversity in shaping of nature: 

(a) Ecological role: Species of many kinds perform some function or the other in an ecosystem.Nothing in an ecosystem evolves and sustains without any reason. That means every organism besides extracting its needs also contributes something useful to other organisms.

(b) Economic role; For all humans, biodiversity is an important resource in their day to day life. One important part of biodiversity is crop diversity, Which is also called agro biodiversity. Biodiversity is seen as a reservoir of resources to be drawn upon for the manufacture of food, pharmaceutical and cosmetic products. Biodiversity also supplies to humankind are food crops, livestock, forests, fish, medicinal, resources,etc.

(c) Specific role: Biodiversity is important because each species can give us some clue as to how life evolved and will continue to evolve. It helps in understanding how life functions and the role of each species in sustaining ecosystems of which we are also a species.

Q.2. What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them? 

Ans: The factors which are responsible for the loss of biodiversity can be grouped into two: (a) Physical or Natural factors 

(b) Non-physical or Man made factors

(a) Physical or natural factors: The major natural factors that are responsible for the loss of biodiversity are: 

1. Earthquake

2. Floods 

3. Volcanic eruptions

4. Forest fires 

5. Droughts.

(b) Non-physical or Man made factors: The noted man made causes by which biodiversity may be losses,are:1. Increase rate of consumption of natural resources, which accelerated the loss of species and habitation in different parts of the world.

2. Deforestation.

3. Overgrazing

4. Pollution (which includes air, water and land) 

5. Rapid growth of human population.

6. Extension use of pesticides in the agricultural sectors.

7. Modern constructions like industries, roads, railway’s, buildings etc.

Steps to prevent the loss of biodiversity: We cannot prevent the natural factors which are responsible for loss of biodiversity. But, the man made factors we can control. Some steps are given below- 

(a) Emphasis should be made to preserve the species.

(b) Proper planning and management.

(c) Extension programme on afforestation.

(d) Check on overexploitation of natural resources especially those of non- renewable.

(e) Population should be controlled.

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