Deforestation, Reforestation, and Forest Conservation

Attempt the quiz above first, then review every question with its correct answer and a short explanation below.

1. Q1.According to NCERT Class 12 Biology, almost 40 percent of forests have been lost in the tropics, compared to only what percentage in the temperate region?

   • A.1 percent✓ Correct Answer
   • B.10 percent
   • C.25 percent
   • D.40 percent

   Explanation: NCERT Class 12 Biology Chapter 16 states: 'Almost 40 per cent forests have been lost in the tropics, compared to only 1 per cent in the temperate region.'

2. Q2.At the beginning of the twentieth century, forests covered about 30 percent of the land of India. By the end of the century, it shrunk to what percentage?

   • A.5 percent
   • B.19.4 percent✓ Correct Answer
   • C.33 percent
   • D.11.5 percent

   Explanation: NCERT documents: 'At the beginning of the twentieth century, forests covered about 30 per cent of the land of India. By the end of the century, it shrunk to 19.4 per cent...'

3. Q3.The National Forest Policy (1988) of India recommends what percentage of forest cover for the plains and the hills respectively?

   • A.19.4% for plains and 30% for hills
   • B.33% for plains and 67% for hills✓ Correct Answer
   • C.50% for plains and 50% for hills
   • D.10% for plains and 90% for hills

   Explanation: NCERT states: 'The National Forest Policy (1988) of India has recommended 33 per cent forest cover for the plains and 67 per cent for the hills.' This is recommended to maintain ecological balance and prevent soil erosion in steep terrains.

4. Q4.Slash and burn agriculture, commonly known as 'Jhum cultivation' in the North-Eastern states of India, involves which of the following farming processes?

   • A.Farming in waterlogged saline swamps.
   • B.Clearing forest tracts by cutting and burning trees, using ash as fertilizer, farming for a few years, and leaving it fallow to recover.✓ Correct Answer
   • C.Continuous industrial hydroponic cultivation.
   • D.Planting coniferous monocultures.

   Explanation: As per NCERT Class 12 Biology, Jhum cultivation involves cutting and burning forest trees, using the nutrient-rich ash as fertilizer for crop farming. When the soil loses fertility after a few years, the land is left fallow to recover naturally while farmers move to clear another forest patch.

5. Q5.Why has Jhum cultivation (slash and burn agriculture) become a major cause of deforestation in North-Eastern India in recent decades?

   • A.Because ash has become toxic to plants.
   • B.Due to population growth shortening the fallow recovery cycle, preventing forests from regenerating.✓ Correct Answer
   • C.Because the government banned organic fertilizers.
   • D.Due to lack of rain in the North-East.

   Explanation: NCERT documents: 'In earlier days, when Jhum cultivation was prevalent, enough time-gap was given so that the land recovered... However, with increasing population, and repeated cultivation, this fallow phase has become shorter and shorter, resulting in deforestation.'

6. Q6.Which of the following is NOT an direct consequence of deforestation?

   • A.Enhanced carbon dioxide concentration in the atmosphere
   • B.Loss of biodiversity due to habitat destruction
   • C.Increased rainfall and water table levels globally✓ Correct Answer
   • D.Soil erosion and desertification

   Explanation: Deforestation leads to reduced rainfall and water cycle disruptions (as transpiration drops). It also increases atmospheric CO2 (since carbon sinks are lost), destroys habitats leading to biodiversity loss, and exposes soil to wind/rain causing erosion and desertification (NCERT Chapter 16).

7. Q7.The process of restoring a forest that once existed but was removed or destroyed at some point in the past is called:

   • A.Deforestation
   • B.Reforestation✓ Correct Answer
   • C.Desertification
   • D.Eutrophication

   Explanation: NCERT Class 12 Biology defines: 'Reforestation is the process of restoring a forest that once existed but was removed at some point of time in the past.' It can occur naturally in a cleared area or through active human tree planting (afforestation).

8. Q8.In 1731, Amrita Devi Bishnoi and 363 other members of the Bishnoi community sacrificed their lives to protect which trees in Jodhpur, Rajasthan?

   • A.Teak trees
   • B.Khejri trees (Prosopis cineraria)✓ Correct Answer
   • C.Sandalwood trees
   • D.Pine trees

   Explanation: Amrita Devi Bishnoi and other Bishnois sacrificed their lives to protect Khejri trees. The King of Jodhpur had ordered his men to cut down trees in the Bishnoi village to obtain wood for constructing a new palace, but the Bishnois hugged the trees to defend them.

9. Q9.Which award has been instituted by the Government of India for individuals or communities from rural areas who show extraordinary courage and dedication in protecting wildlife?

   • A.Indira Gandhi Paryavaran Puraskar
   • B.Amrita Devi Bishnoi Wildlife Protection Award✓ Correct Answer
   • C.Medini Puraskar Yojana
   • D.National Clean Environment Award

   Explanation: NCERT Class 12 Biology documents: 'The Government of India has recently instituted the Amrita Devi Bishnoi Wildlife Protection Award for individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting wildlife.'

10. Q10.The famous 'Chipko Movement' of Garhwal Himalayas was launched in which year, where local women hugged trees to protect them from contractors?

    • A.1972
    • B.1974✓ Correct Answer
    • C.1980
    • D.1988

    Explanation: NCERT documents: 'You have heard of the Chipko Movement of Garhwal Himalayas. In 1974, local women showed enormous bravery in protecting trees from the axe of contractors by hugging them.' This became a global symbol of eco-feminist environmental movements.

11. Q11.Which forest management concept was introduced by the Government of India in the 1980s to work closely with local communities for protecting and managing forests?

    • A.Social Forestry
    • B.Joint Forest Management (JFM)✓ Correct Answer
    • C.Silviculture programs
    • D.Agroforestry

    Explanation: NCERT Class 12 Biology Chapter 16 states: 'Realising the significance of participation by local communities, the Government of India in 1980s introduced the concept of Joint Forest Management (JFM) so as to work closely with the local communities for protecting and managing forests.'

12. Q12.In the Joint Forest Management (JFM) framework, what benefits do local communities receive in return for their conservation services?

    • A.Direct cash salary from the government
    • B.Sustainable forest products like non-timber forest products (fruits, gum, medicine, thatch) and a share in timber harvest✓ Correct Answer
    • C.Ownership of the forest land
    • D.Complete tax exemption

    Explanation: JFM rewards communities without giving them land titles. In return for protecting forests, communities get sustainable access to non-timber forest products (NTFPs) like fruits, honey, medicinal plants, fodder grass, and a share of the profits when timber is commercially harvested.

13. Q13.The science of growing, cultivating, and managing forest trees and crops for commercial timber and ecological services is called:

    • A.Olericulture
    • B.Silviculture✓ Correct Answer
    • C.Pisciculture
    • D.Apiculture

    Explanation: Silviculture is the branch of forestry dealing with the development and care of forests. It focuses on controlling forest establishment, growth, composition, health, and quality of forests to meet diverse needs.

14. Q14.Which forest conservation scheme was launched in India in 1976 to plant trees on barren and non-forest lands to reduce pressure on traditional forests?

    • A.Joint Forest Management
    • B.Social Forestry Scheme✓ Correct Answer
    • C.Project Green India
    • D.Silvicultural bounds

    Explanation: The Social Forestry Scheme was launched in 1976 by the Government of India. It aimed to plant trees on empty, common, or degraded lands outside forest reserves (roadside, railway tracts, canal banks) to provide fuelwood and fodder, reducing community dependency on traditional reserve forests.

15. Q15.Which of the following describes 'Agroforestry'?

    • A.Farming fish inside forests.
    • B.Growing agricultural crops and forest trees together on the same piece of land.✓ Correct Answer
    • C.Complete destruction of trees for farming.
    • D.Growing crops without water.

    Explanation: Agroforestry is a land-use management system where woody perennials (trees/shrubs) are grown around or among agricultural crops or pasture lands. It combines agricultural and forestry technologies to create more diverse, productive, and sustainable land-use systems.

16. Q16.How does deforestation directly contribute to global warming?

    • A.By increasing atmospheric nitrogen levels.
    • B.By removing carbon sinks (trees), which increases atmospheric carbon dioxide concentration as less carbon is absorbed and carbon stored in wood is released upon burning/decay.✓ Correct Answer
    • C.By cooling down the Earth's surface directly.
    • D.By reflecting all solar radiation back to space.

    Explanation: NCERT notes that trees absorb carbon dioxide during photosynthesis, storing carbon in their biomass. Deforestation removes this carbon sink. Furthermore, when wood is burned or left to rot, the stored carbon is oxidized and released back into the atmosphere as CO2, a potent greenhouse gas.

17. Q17.In India, forest lands protected by communities where cutting trees is forbidden due to traditional taboos are known as:

    • A.National Reserves
    • B.Sacred Groves (Pavitra Van)✓ Correct Answer
    • C.Community Gardens
    • D.Afforested Lands

    Explanation: NCERT Class 12 Biology highlights Sacred Groves as a traditional in-situ conservation strategy. Religious beliefs and cultural taboos protect these forest tracts, and local communities prohibit any cutting of trees or hunting of animals in these groves.

18. Q18.Which of the following is a primary ecological benefit of reforestation?

    • A.Increasing soil erosion
    • B.Restoring carbon sinks, stabilizing hydrological cycles, and rebuilding habitats for lost biodiversity✓ Correct Answer
    • C.Decreasing soil organic matter
    • D.Reducing ground water recharge

    Explanation: Reforestation helps rebuild ecosystems. Trees bind the soil, reducing erosion, absorb atmospheric CO2, release moisture through transpiration (regulating rainfall), and recreate the vertical layers and niches needed for biodiversity to return.

19. Q19.The Chipko Movement originated in which specific region of India?

    • A.Western Ghats, Karnataka
    • B.Reni village, Garhwal Himalayas (Uttarakhand)✓ Correct Answer
    • C.Thar Desert, Rajasthan
    • D.Sundarbans, West Bengal

    Explanation: The Chipko Movement started in 1973/1974 in Reni village, Chamoli district, Garhwal Himalayas (now in Uttarakhand). It was led by local villagers, particularly women like Gaura Devi, and later supported by Sunderlal Bahuguna.

20. Q20.How does forest fragmentation (breaking large forests into patches) impact forest bird populations?

    • A.It increases their breeding success.
    • B.It isolates populations, increases edge effects, and disrupts nesting habitats and migratory routes.✓ Correct Answer
    • C.It has no impact.
    • D.It turns them into herbivores only.

    Explanation: NCERT Chapter 15 details habitat fragmentation: Large forests broken into patches create larger 'edge' areas exposed to wind and predators. This isolates bird populations, increases nest predation by edge predators, and disrupts species that require large territories.