NIOS Class 12 Biology Chapter 26 Conservation and Use of Natural Resources

NIOS Class 12 Biology Chapter 26 Conservation and Use of Natural Resources Solutions to each chapter is provided in the list so that you can easily browse throughout different chapters NIOS Class 12 Biology Chapter 26 Conservation and Use of Natural Resources Notes and select need one. NIOS Class 12 Biology Chapter 26 Conservation and Use of Natural Resources Question Answers Download PDF. NIOS Study Material of Class 12 Biology Notes Paper 314.

NIOS Class 12 Biology Chapter 26 Conservation and Use of Natural Resources

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Also, you can read the NIOS book online in these sections Solutions by Expert Teachers as per National Institute of Open Schooling (NIOS) Book guidelines. These solutions are part of NIOS All Subject Solutions. Here we have given NIOS Class 12 Biology Chapter 26 Conservation and Use of Natural Resources Solutions, NIOS Senior Secondary Course Biology Solutions for All Chapter, You can practice these here.

Conservation and Use of Natural Resources

Chapter: 26

MODULE – IV: ENVIRONMENT AND HEALTH

NIOS TEXTBOOK QUESTIONS ANSWERS

INTEXT QUESTIONS 26.1

1. Given below are certain wrong statements. Identify the mistake and write the correct statement below each.

(i) Plastic is a natural resource.

Ans: Plastic is an artificial resource.

(ii) Forest is an exhaustible non-renewable resource.

Ans: Forest is an exhaustible renewable resource.

(iii) The exhaustible resources, which are not replaced after consumption are known as renewable resources.

Ans: The exhaustible resources, which are not replaced after consumption are known as non-renewable resources.

Or

The exhaustible resources which are replaced after consumption, are known as renewable resources.

2. Classify the following under the three respective categories of natural resources:

Air, iron, sand, petroleum, wind, clay, fish, forest, gold, pearls.

(i) Inexhaustible.

(ii) Renewable. and 

(iii) Non-renewable.

Ans:

INTEXT QUESTIONS 26.2

1. Why should we conserve natural resources? State any two reasons.

Ans: Two reasons to conserve natural resources are:

(a) To maintain ecological balance for supporting life.

(b) To preserve different kinds of species.

2. Given below are certain incomplete words. Complete them by taking clues from the statement given below for each. Each blank space represents one letter only.

(i) ___ ___ ___ pk ___. (A movement started by women to stop the felling of trees by hugging them)

Ans: Chipki.

(ii) T___ ___ ___ i. (A sacred plant worshipped in India) 

Ans: Tulsi.

(iii) Kh ___ ch ___ ___ pa ___ ___ i. (A lake in Sikkim that was declared sacred by the people)

Ans: Khecheopatri. 

INTEXT QUESTIONS 26.3

1. How do the following cause soil erosion?

(i) Wind.

Ans: Wind: Strong wind carries away the loose top soil.

(ii) Overgrazing.

Ans: Overgrazing: It removes the protective vegetation, thus help in erosion by wind and water.

(iii) Water. 

Ans: Water: The rain drops carry away the soil not covered by vegetation.

2. Match the items of Column A with those of Column B.

Ans: 

INTEXT QUESTIONS 26.4

1. Why do we consider fresh water as a renewable resource?

Ans: Because it is produced continuously through the hydrological cycle.

2. Give three methods of water conservation.

Ans: Three methods of water conservation are as under:

(i) By constructing dams and reservoirs.

(ii) rainwater harvesting and By judicious use of water.

INTEXT QUESTIONS 26.5

1. Some of the following words/terms are related to conservation of biodiversity and some are threat to biodiversity. Identify the points relating to conservation by mentioning ‘C’ and threat to biodiversity by mentioning ‘T’ against the points.

(i) Wildlife sanctuaries (_________)

Ans: C.

(ii) Population explosion (_________)

Ans: T.

(iii) Industrialisation (_________)

Ans: T.

(iv) Zoo (_________)

Ans: C.

(v) Tissue culture (_________)

Ans: C.

(vi) Pollution (_________)

Ans: Τ.

INTEXT QUESTIONS 26.6

1. What is Red Data Book?

Ans: Red Data Book is published by IUCN It provides information about endangered plants and animals.

2. Define the term ‘Wildlife’.

Ans: Plants, animals as well as microbes other than cultivated plants and domesticated animals make wildlife.

3. Below are certain incomplete words. Complete them by taking clues from the statement given below for each. Each blank represent the letter only.

(i) A ___ ___ or ___ ___ ___ at ___ on. (Tree planting programme).

Ans: Afforestation.

(ii) Be ___ ___ ado ___ ___ a. (An endangered Indian plant). 

Ans: Bella donna.

(iii) Rh ________ no _________ r _______ (An endangered animal). 

Ans: Rhinoceros.

INTEXT QUESTIONS 26.7

1. Expand the following:

(i) WWF. 

Ans: WWF: World Wildlife Fund.

(ii) CITES.

Ans: CITES: Convention of International Trade in Endangered Species. 

(iii) IUCN.

ANs: IUCN: International Union for Conservation of Natural Resources.

2. Match the items of column A with those of column B.

Ans:

INTEXT QUESTIONS 26.8 

1. A and B are two friends. In their daily life both have different opinion on certain matters. Considering the necessity of sustainable development give your suggestions in the given space.

(i) A says — Polythene bags should be used to carry vegetables.

(ii) B says — Jute bags should be used to carry vegetables.

Who is right and why?

Ans: B is right, as the jute bags are biodegradable and eco-friendly. The science has invented the biodegradable polythene bags, but all are not biodegradable. Therefore they cause pollution.

2. Mention any two activities which will help in sustainable development.

Ans: (i) Judicial use of natural resources. 

(ii) Conservation of nature and its resources.

INTEXT QUESTIONS 26.9

1. Coal is a non-renewable source of energy whereas wood charcoal is renewable. Why?

Ans: The coal cannot be regenerated after consumption. The wood charcoal is obtained from wood. The wood can be obtained continuously from trees of the forest.

2. How are the following useful in our day to day life?

(i) CNG.

Ans. CNG = It is used for cooking and transportation.

(ii) PNG.

Ans. PNG = It is used for cooking.

(iii) LPG.

Ans: LPG = LPG is used for cooking, Ligh-tening and transportation. 

3. A and B are two friends. In their daily life both have different opinion on certain matters. Considering the necessity of sustainable development give your suggestions in the given space.

A says: Coal should be used as fuel to cook our food.

B says: LPG should be used as a fuel to cook our food.

Who is right and why?

Ans: B is right. The LPG causes less pollution than coal.

INTEXT QUESTIONS 26.10

1. Why do we consider sun as the best source of energy?

Ans: Sun energy is available free of cost and in ample quantity, everlasting. This has no boundaries. This is also free from political barriers.

2. What is meant by ‘radioactive pollution’?

Ans: If the radioactive elements are not disposed off properly they cause disintegration in soil and water and hence cause pollution.

3. What are the advantages and disadvantages of nuclear energy?

Ans: Our country (India) has sufficient thorium to generate electricity (nuclear energy) but it causes pollution.

4. The following table contains the different sources of energy and their uses. Put a tick (✔) mark under the source against the appropriate use(s)

Ans:

5. Mention any three ways of conservation of electric energy at your home.

Ans: Three ways of conservation of electric energy at home are:

(i) Judicious use of electricity.

(ii) Use of floroscent lamp instead of incandescent lamp. and 

(iii) Create awareness about the proper use of electricity.

TERMINAL EXERCISES 

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