NCERT Solutions for Class 11 Geography Chapter 5: Natural Vegetation

These Class 11 Geography Chapter 5 solutions cover Natural Vegetation from India: Physical Environment, the NCERT textbook for the 2026–27 session. The chapter explains what natural vegetation is, the five major types of forests in India (tropical evergreen and semi-evergreen, tropical deciduous, tropical thorn, montane, and littoral and swamp forests), the conditions that produce each type, and the country’s efforts at forest conservation, social forestry, wildlife conservation and biosphere reserves. Below you get step-by-step answers to every NCERT exercise question, clear notes on key terms, extra practice, MCQs, Assertion–Reason questions and FAQs.

Class: 11 Subject: Geography Book: India: Physical Environment Chapter: 5 Chapter Name: Natural Vegetation Session: 2026–27
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Class 11 Geography Chapter 5 – Overview

Chapter 5, Natural Vegetation, defines natural vegetation as a plant community left undisturbed for a long time, allowing its species to adjust fully to climate and soil. India’s great variety of vegetation is grouped into five types of forests — Tropical Evergreen and Semi Evergreen (rainfall over 200 cm, found in the Western Ghats, the north-east and the Andaman & Nicobar Islands), Tropical Deciduous or monsoon forests (rainfall 70–200 cm, the most widespread, divided into moist and dry deciduous), Tropical Thorn forests (rainfall below 50 cm), Montane forests (changing with altitude, the northern and southern mountain forests) and Littoral and Swamp (mangrove) forests of the coasts and wetlands. The chapter also describes the British exploitation of forests, the forest policy of 1952 (modified 1988), social forestry (urban, rural and farm forestry), the threats to wildlife, the Wildlife Act of 1972, conservation projects such as Project Tiger (1973) and Project Elephant (1992), and the 18 Biosphere Reserves recognised under UNESCO’s Man and Biosphere Programme.

Key Concepts & Terms

Natural vegetation: a plant community that has been left undisturbed over a long time, so that its individual species adjust themselves to the climate and soil conditions as fully as possible.

Tropical evergreen forests: dense forests of warm, humid areas with rainfall over 200 cm and mean annual temperature above 22°C; trees reach 60 m or more, never shed all their leaves together, and appear green all year (rosewood, mahogany, aini, ebony).

Tropical deciduous (monsoon) forests: the most widespread Indian forests, growing in regions with 70–200 cm rainfall; trees shed their leaves in the dry season. Divided into moist deciduous (100–200 cm: teak, sal, sandalwood) and dry deciduous (70–100 cm: tendu, palas, amaltas, khair).

Tropical thorn forests: grasses and shrubs of areas with rainfall below 50 cm; plants stay leafless most of the year (babool, ber, wild date palm, khejri, neem).

Montane forests: mountain forests that change with altitude. Northern mountain forests show a succession from deciduous to wet temperate, pine, deodar, blue pine, spruce, silver fir and finally alpine forests and pastures; southern mountain forests include the Sholas of the Nilgiris, Anaimalai and Palani hills.

Littoral and swamp (mangrove) forests: salt-tolerant wetland forests of coasts, tidal creeks, mud flats and estuaries; highly developed in the Sunderbans and the Andaman & Nicobar Islands.

Social forestry: the management, protection and afforestation of barren land for environmental, social and rural development; classified by the National Commission on Agriculture (1976) into urban, rural and farm forestry.

Biosphere reserve: a unique and representative ecosystem of terrestrial and coastal areas recognised internationally under UNESCO’s Man and Biosphere (MAB) Programme; India has 18, of which 12 are on the World Network.

Wildlife conservation: protection of flora and fauna under the Wildlife (Protection) Act, 1972 (amended 1991), through national parks, sanctuaries and projects like Project Tiger and Project Elephant.

Forest cover vs forest area: forest area is the area notified/recorded as forest in government records, while forest cover is the actual area on the ground that is under tree canopy as seen by satellite, irrespective of legal status.

NCERT Exercises — Full Solutions

All questions below are reproduced verbatim from the NCERT textbook’s end-of-chapter Exercises. Answers are original, written in exam-ready style.

1. Choose the right answer from the four alternatives given below.

(i) Sandalwood is an example of: (a) Evergreen forest (b) Deciduous forest (c) Deltaic forest (d) Thorny forest

ANSWER (b) Deciduous forest. Sandalwood is one of the main species of the moist tropical deciduous (monsoon) forests, along with teak, sal, shisham and mahua.

(ii) Which one of the following was the purpose of Project Tiger? (a) to kill tigers (b) to put tigers in the Zoo (c) to protect tigers from illegal hunting (d) to make films on tigers

ANSWER (c) to protect tigers from illegal hunting. Project Tiger (1973) aims to maintain a viable population of tigers in their natural habitat and to preserve areas of biological importance, which requires protecting tigers from poaching and illegal hunting.

(iii) In which one of the following states is the Nandadevi Biosphere reserve situated? (a) Bihar (b) Uttar Pradesh (c) Uttarakhand (d) Odisha

ANSWER (c) Uttarakhand. As per the list of biosphere reserves, the Nanda Devi Biosphere Reserve (designated 1988) is located in Uttarakhand.

(iv) How many of the Biosphere reserves from India are recognised by the UNESCO? (a) One (b) Two (c) Twelve (d) Four

ANSWER (c) Twelve. Out of India’s 18 biosphere reserves, twelve have been recognised by UNESCO on the World Network of Biosphere Reserves.

(v) Which one of the following proportion of area of the country was targeted to be under forest in Forest Policy of India? (a) 33 (b) 44 (c) 55 (d) 22

ANSWER (a) 33. The forest policy aimed at bringing 33 per cent of the country’s geographical area under forest cover.

2. Answer the following questions in about 30 words.

(i) What is natural vegetation? Under what climatic conditions are tropical evergreen forests develop?

ANSWER Natural vegetation is a plant community left undisturbed for a long time, so its species adjust fully to the climate and soil. Tropical evergreen forests develop in warm, humid areas with rainfall over 200 cm and mean annual temperature above 22°C.

(ii) What do you understand by social forestry?

ANSWER Social forestry means the management and protection of forests and the afforestation of barren land with the purpose of helping in environmental, social and rural development. It is classified into urban forestry, rural forestry and farm forestry.

(iii) Define Biosphere reserves?

ANSWER A biosphere reserve is a unique and representative ecosystem of terrestrial and coastal areas, internationally recognised within the framework of UNESCO’s Man and Biosphere (MAB) Programme. It aims to conserve biodiversity, promote sustainable development and support research.

(iv) What is the difference between forest area and forest cover?

ANSWER Forest area is the area legally notified and recorded as forest in government records, whether or not trees grow on it. Forest cover is the actual land under tree canopy on the ground, measured by satellite, regardless of its legal ownership or status.

3. Answer the following questions in not more than 150 words.

(i) What steps have been taken up to conserve forests?

ANSWER Recognising the vital importance of forests, the Government of India adopted a forest policy in 1952, modified in 1988, stressing sustainable forest management. Several steps have been taken to conserve forests: 1. Setting targets: bringing 33 per cent of the geographical area under forest cover, and maintaining environmental stability by restoring forests where ecological balance was disturbed. 2. Protecting heritage: conserving the country’s natural heritage, its biological diversity and genetic pool. 3. Checking degradation: controlling soil erosion, the spread of deserts and the occurrence of floods and droughts. 4. Expanding cover: increasing forest cover through social forestry and afforestation of degraded land. 5. Meeting needs: raising the productivity of forests to supply timber, fuel, fodder and food to rural people and encouraging substitutes for wood. 6. People’s movement: creating a massive people’s movement, involving women, to plant trees and stop the felling of trees, thereby reducing pressure on existing forests.

(ii) How can people’s participation be effective in conserving forests and wildlife?

ANSWER People’s participation is essential because forests and wildlife can be protected effectively only when every individual understands their significance and contributes. It can be made effective in several ways: 1. Mass movement: creating a people’s movement, especially involving women, to encourage tree planting and stop the felling of trees, as the forest policy envisages. 2. Social forestry: involving communities in urban, rural and farm forestry — raising trees on village pastures, roadsides, canal banks, farmlands and around homes. 3. Using tribal knowledge: tribal communities live in harmony with nature; their age-old knowledge of forestry should be used, and they should be made growers of minor forest produce rather than mere collectors. 4. Awareness and ecotourism: spreading awareness about the value of wildlife, discouraging poaching and grazing in protected areas, and promoting responsible ecotourism so that local people benefit from conservation. In this way local people become partners in protecting forests and wildlife rather than agents of their destruction.

Project/Activity

1. On the outline map of India, mark and label the following. (i) Areas having Mangrove forests. (ii) Biosphere reserves of Nanda Devi, Sunderbans, Gulf of Mannar and Nilgiri. (iii) Mark the location of Forest Survey of India Head Quarter.

ANSWER This is a map activity to be done in your practical/atlas notebook. Use a political outline map of India and mark the locations described below; key map facts to remember: (i) Mangrove forests: mark the Sunderbans (West Bengal coast, at the mouth of the Ganga–Brahmaputra delta), the Andaman & Nicobar Islands, and the deltas of the Mahanadi (Odisha), the Godavari and the Krishna (Andhra Pradesh) on the east coast. (ii) Biosphere reserves: Nanda Devi — Uttarakhand (northern India); Sunderbans — West Bengal (eastern coast); Gulf of Mannar — off the coast of Tamil Nadu (south-east); Nilgiri — the meeting point of Tamil Nadu, Kerala and Karnataka (south India). (iii) Forest Survey of India headquarters: mark Dehradun in Uttarakhand.

2. List the trees, bush and shrub species found around your school. Write their local names and their uses.

ANSWER This is a field observation activity, so your answers will depend on where your school is located. Walk around your school, identify the plants and record them in a table like the one below. A sample answer for a north-Indian plains school:
Species (local name)TypeCommon uses
Neem (Neem)TreeShade, medicine, neem oil, natural pesticide
Peepal (Pipal)TreeShade, oxygen, religious and cultural value
Babool (Kikar)TreeFuelwood, gum, fodder, soil binding
Ashoka (Ashok)TreeOrnamental, hedging, medicinal bark
Hibiscus (Gudhal)ShrubOrnamental flowers, hair and skin care
Tulsi (Tulsi)Bush/herbMedicinal, religious, mosquito repellent
(Record the plants you actually find around your own school with their local names and uses.)

Extra Practice Questions

Short Answer Type Questions

Q1. Why are tropical deciduous forests called monsoon forests?

ANSWERTropical deciduous forests are called monsoon forests because they grow in regions that depend on the monsoon rainfall of 70–200 cm. As the dry season begins, the trees shed their leaves completely to conserve water, responding directly to the monsoon climate.

Q2. Name the two main divisions of tropical deciduous forests and the rainfall each receives.

ANSWERTropical deciduous forests are divided into moist deciduous forests, found where rainfall is between 100–200 cm (with species like teak and sal), and dry deciduous forests, found where rainfall is between 70–100 cm (with species like tendu, palas and khair).

Q3. What are Sholas?

ANSWERSholas are temperate forests found in the southern mountain forests of Peninsular India — in the Nilgiris, the Anaimalai and the Palani hills. They occur in the higher regions above about 1,500 m, where the climate becomes temperate despite being close to the tropics.

Q4. Where are mangrove forests highly developed in India?

ANSWERMangrove forests are highly developed in the Andaman & Nicobar Islands and the Sunderbans of West Bengal. Other significant areas are the deltas of the Mahanadi, the Godavari and the Krishna. They cover about 4,992 sq km, roughly 7 per cent of the world’s mangroves.

Q5. How did the British change the structure of Indian forests?

ANSWERThe British exploited forests on a large scale for their economic value. They replaced the oak forests of Garhwal and Kumaon with pine (chirs) for railway lines, cleared forests for tea, rubber and coffee plantations, and used timber for construction. Thus the protectional use of forests was replaced by commercial use.

Long Answer Type Questions

Q1. Describe the five major types of natural vegetation (forests) found in India.

ANSWEROn the basis of predominant vegetation type and climatic regions, Indian forests are divided into five groups. (1) Tropical evergreen and semi evergreen forests grow in warm, humid areas with over 200 cm rainfall (Western Ghats, north-east, Andaman & Nicobar); trees rise to 60 m, stay green all year, and include rosewood, mahogany and ebony. (2) Tropical deciduous (monsoon) forests are the most widespread (rainfall 70–200 cm) and are sub-divided into moist deciduous (teak, sal) and dry deciduous (tendu, palas, khair); trees shed leaves in the dry season. (3) Tropical thorn forests occur where rainfall is below 50 cm (semi-arid Rajasthan, Gujarat, Punjab) with grasses, shrubs, babool, ber and khejri. (4) Montane forests change with altitude into northern and southern mountain forests, ranging from deciduous through pine, deodar and silver fir to alpine pastures, and the Sholas of the south. (5) Littoral and swamp (mangrove) forests are salt-tolerant forests of coasts and wetlands, well developed in the Sunderbans and the Andamans.

Q2. Discuss the succession of vegetation in the northern montane (Himalayan) forests with increasing altitude.

ANSWERThe Himalayan ranges show a clear succession of vegetation from tropical to tundra as altitude increases, because temperature falls with height. At the foothills are deciduous forests. Between 1,000–2,000 m these give way to wet temperate forests. In the higher hill ranges of north-east India, West Bengal and Uttaranchal, evergreen broad-leaf trees like oak and chestnut dominate. Between 1,500–1,750 m pine forests are well developed, with the commercially useful Chir Pine; deodar, a valued endemic species, grows in the western Himalayas, along with chinar and walnut that sustain Kashmir’s handicrafts. Blue pine and spruce appear at 2,225–3,048 m, with temperate grasslands in places. Silver firs, junipers, pines, birch and rhododendrons occur between 3,000–4,000 m, beyond which there is a transition to alpine forests and pastures used for transhumance by tribes like the Gujjars, Bakarwals, Bhotiyas and Gaddis. At the highest reaches, mosses and lichens form the tundra vegetation.

Q3. Explain the threats to India’s wildlife and the measures taken for its conservation.

ANSWERIndia holds 4–5 per cent of the world’s known plant and animal species, but their numbers have dwindled. The main threats are: industrial and technological advancement increasing the exploitation of forest resources; clearing of land for agriculture, settlements, roads, mining and reservoirs; pressure from lopping for fodder and fuelwood; grazing by domestic cattle damaging habitat; hunting as a sport and rampant commercial poaching; and forest fires. To counter these, several measures have been taken. The comprehensive Wildlife (Protection) Act was enacted in 1972 (amended 1991) to protect endangered species and create national parks, sanctuaries and closed areas — today there are 107 national parks and 573 wildlife sanctuaries. Special schemes such as Project Tiger (1973), Project Elephant (1992), the Crocodile Breeding Project, Project Hangul and the conservation of the Himalayan musk deer protect particular species. Finally, 18 Biosphere Reserves (12 recognised by UNESCO) conserve entire representative ecosystems along with their flora and fauna.

MCQs & Assertion–Reason

1. Tropical evergreen forests require an annual rainfall of more than:

(a) 50 cm    (b) 100 cm    (c) 150 cm    (d) 200 cm

2. Which of the following is the most widespread forest type in India?

(a) Tropical evergreen    (b) Tropical deciduous    (c) Tropical thorn    (d) Montane

3. Tropical thorn forests occur in areas receiving rainfall of less than:

(a) 50 cm    (b) 70 cm    (c) 100 cm    (d) 150 cm

4. Sholas are forests found in the:

(a) Himalayan foothills    (b) Thar desert    (c) Nilgiris, Anaimalai and Palani hills    (d) Gangetic plain

5. Which tree is a highly valued endemic species of the western Himalayas, used in construction?

(a) Teak    (b) Deodar    (c) Babool    (d) Rosewood

6. Mangrove forests in India are most highly developed in the Sunderbans and the:

(a) Western Ghats    (b) Andaman & Nicobar Islands    (c) Aravallis    (d) Vindhyas

7. The forest policy of India was first adopted in 1952 and modified in:

(a) 1972    (b) 1980    (c) 1988    (d) 1991

8. Social forestry was classified into urban, rural and farm forestry by the National Commission on Agriculture in:

(a) 1952    (b) 1972    (c) 1976    (d) 1988

9. Project Elephant was launched in:

(a) 1973    (b) 1986    (c) 1992    (d) 2000

10. How many biosphere reserves are there in India?

(a) 12    (b) 15    (c) 18    (d) 22

Answer key: 1-(d), 2-(b), 3-(a), 4-(c), 5-(b), 6-(b), 7-(c), 8-(c), 9-(c), 10-(c).

For each Assertion–Reason question, choose: (A) Both true and the Reason correctly explains the Assertion; (B) Both true but the Reason is not the correct explanation; (C) Assertion true, Reason false; (D) Assertion false, Reason true.

A-R 1. Assertion: Tropical evergreen forests appear green throughout the year.

Reason: In these forests there is no definite time for trees to shed their leaves, flower and bear fruit.

A-R 2. Assertion: Tropical deciduous forests shed their leaves in the dry season.

Reason: These forests grow only in areas receiving rainfall of more than 200 cm.

A-R 3. Assertion: Natural vegetation changes with altitude in the Himalayan ranges.

Reason: Temperature decreases with increasing altitude, leading to a corresponding change in vegetation.

A-R 4. Assertion: The Wildlife (Protection) Act was enacted in India in 1972.

Reason: The Act provides the main legal framework for the conservation and protection of wildlife in India.

A-R 5. Assertion: All 18 biosphere reserves of India are recognised by UNESCO.

Reason: Biosphere reserves conserve representative ecosystems under the Man and Biosphere Programme.

Answer key: 1-(A), 2-(C), 3-(A), 4-(A), 5-(D).

Exam Tips & Common Mistakes

How to score full marks in this chapter

Memorise the rainfall ranges tied to each forest type — evergreen (over 200 cm), deciduous (70–200 cm, moist 100–200, dry 70–100), thorn (below 50 cm) — as these are favourite one-mark and MCQ questions. Learn at least three characteristic species for each forest type. Keep key dates ready: forest policy 1952 (modified 1988), Wildlife Act 1972 (amended 1991), Project Tiger 1973, Project Elephant 1992. For the conservation answer, organise points under headings. For map work, fix the locations of the Sunderbans, the Nilgiri, Nanda Devi and Gulf of Mannar biosphere reserves and the Forest Survey of India at Dehradun.

Common mistakes to avoid

  • Mixing up the rainfall figures for evergreen, deciduous and thorn forests.
  • Calling sandalwood an evergreen species — it belongs to the moist deciduous forests.
  • Confusing forest area (recorded/legal) with forest cover (actual tree canopy on the ground).
  • Stating that all 18 biosphere reserves are recognised by UNESCO — only twelve are on the World Network.
  • Mixing up the launch years of Project Tiger (1973) and Project Elephant (1992).
  • Leaving the map and field-observation activities blank — attempt them with real locations and local plant names.

Frequently Asked Questions

What is Chapter 5 of Class 11 Geography (India: Physical Environment) about?

Chapter 5, Natural Vegetation, explains what natural vegetation is, describes the five major forest types of India (tropical evergreen and semi-evergreen, tropical deciduous, tropical thorn, montane, and littoral and swamp forests), and covers forest conservation, social forestry, wildlife conservation, conservation projects and India’s biosphere reserves.

What are the five types of forests found in India?

The five types are: (1) Tropical Evergreen and Semi Evergreen forests, (2) Tropical Deciduous (monsoon) forests, (3) Tropical Thorn forests, (4) Montane (mountain) forests, and (5) Littoral and Swamp (mangrove) forests. They are classified on the basis of predominant vegetation type and climatic conditions, mainly rainfall.

How many biosphere reserves does India have and how many are recognised by UNESCO?

India has 18 biosphere reserves established under UNESCO’s Man and Biosphere (MAB) Programme. Of these, twelve have been recognised by UNESCO on the World Network of Biosphere Reserves, such as the Nilgiri, Nanda Devi, Sunderban and Gulf of Mannar reserves.

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