Here are all 49 Biogeography questions asked in UPSC Geography Optional Paper I from 1995 to 2026, arranged under the 5 topics of the official syllabus. Within each topic the latest questions come first.
Each question ends with a code such as [2024/15m/3b] – the year, the marks, the word limit (where UPSC set one) and the question number in the paper.
4.1] Genesis of soils; classification and distribution of soils; soil profile
16 questions
How a ‘Solum’ as a concept different from ‘Pedon’? Describe. [2026/10m/150w/1d]
Explain the natural processes of soil enrichment and its impact on food production. [2023/10m/150w/1c]
Differentiate between the characteristics of organic horizons and mineral horizons in a generalised soil profile. [2023/15m/4b]
Well developed soils typically exhibit distinct layers in their soil profile. Elaborate. [2022/10m/150w/1e]
How are soil acidity and alkalinity related to soil fertility? [2019/15m/3b]
Distinguish between intrazonal and azonal soils. Describe in brief the characteristics and importance of azonal soils. [2018/10m/150w/1d]
Distinguish between the characteristics of Chernozem and Sierozem soils. [2017/15m/3b]
Classify soils based on their zonal distribution and describe the characteristics of pedocals. [2015/15m/3c]
Write a short note on: Soil profile in Zonal and Azonal soils. [2011/12m/150w/1d]
Write a short note on: Zonal and Azonal soils. [2009/20m/200w/5d]
Write a short note on: Distribution of soils. [2006/20m/200w/5a]
Write a short note on: Genesis of Soils. [2003/20m/200w/5a]
Write a short note on: Soil Profile. [2000/20m/200w/5b]
Write a short note on: Soil genesis. [1998/20m/200w/2a]
Write a short note on: Weathering and soil formation. [1997/20m/200w/2c]
Discuss the processes of mechanical and chemical weathering and show their relationship with soil formation. [1996/60m/3]
4.2] Soil erosion, degradation and conservation
4 questions
“Soil erosion is creeping death.” Explaining the statement, suggest various soil conservation measures. [2024/15m/3b]
Soil erosion and soil degradation are threat to food supply. Discuss. [2021/15m/2c]
“Land degradation is a threat to productivity and sustainable resource management.” Explain with suitable examples from India. [2020/15m/6b]
Write a short note on: Soil erosion and conservation. [2005/20m/200w/5b]
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19 questions
How does the annual variations in temperature and precipitation influence plants growth, development and distribution? How do animals cope up with variations in climate? [2026/20m/4a]
“The latitudinal gradient in species richness is an important geographic trend in biodiversity.” Examine the statement. [2024/15m/4c]
Plants and animals that exist in a particular ecosystem are those that have been successful in adjusting to their habitat and environmental conditions. Elucidate with examples. [2022/20m/3a]
Which factors influence the growth of wild plants in India? Discuss their economic significance. [2020/10m/150w/1d]
Land use/Land cover and soil types influence forage quantity and quality in semi-arid regions of the world. Discuss with relevant examples. [2020/15m/4b]
Amensalism is a biotic factor that determines the geographic limits of species. Explain. [2019/10m/150w/1d]
Describe the characteristics of biological deserts. [2017/10m/150w/1d]
Give a classification of plants based on the amount of water requirement. [2017/15m/3c]
Bring out the ecological significance of Tropical Rainforest Biome. [2016/10m/150w/1d]
Describe Newbigin’s scheme of Floristic regions of the world and explain the Mediterranean Floristic region. [2016/15m/4c]
Explain the characteristics of ecological succession. [2015/10m/150w/1d]
State the uniqueness of the Eurasian Steppe Biome. [2014/10m/150w/1d]
Define zoogeographic region. Also describe the basic faunal makeup of the Neo-Arctic zoogeographic region. [2014/15m/4b]
Write a short note on: Uniqueness of fauna in the Notogean realm. [2013/10m/150w/1c]
Bring out the relationship between climate and vegetation in the Mountain Biome. [2013/15m/250w/3c]
Comment on: Adaptation and distribution of animals in the Ethiopian realm. [2012/20m/250w/3b]
Define the term biome. List the terrestrial biomes and describe the characteristics of Savanna biome. [2011/30m/4b]
Write a short note on: Floristic kingdoms, based on their global distribution. [2010/15m/200w/1d]
Give a brief account of principal land biomes and their latitudinal distribution. [2009/20m/200w/1b]
4.4] Problems of deforestation and conservation measures; social forestry; agro-forestry
7 questions
What are the ecological consequences of agricultural deforestation in the Amazon and Congo Basins, particularly concerning biodiversity and climate regulation? [2025/20m/4a]
Examine the impacts of social forestry in socio-economic transformation of rural areas. [2024/10m/150w/1d]
Explain the effects and causes of deforestation, and its impact on the pattern of agriculture in India. [2020/15m/3b]
Discuss the causes of degradation of tropical rainforests and suggest remedial measures for their prevention, conservation and development. [2018/15m/4c]
Write a short note on: Social Forestry and Environmental Conservation. [2007/20m/200w/5a]
Write a short note on: Agro-forestry. [2001/20m/200w/5a]
Write a short note on: Man and the Amazon rainforest. [1996/20m/200w/2d]
4.5] Wild life; major gene pool centres
3 questions
Man and wildlife conflicts are ever increasing. Discuss its causes, consequences and remedies. [2025/15m/2c]
Gene pool centres are ‘Good Hope’ for biodiversity conservation. Elucidate. [2021/10m/150w/1d]
Why is it necessary to conserve genetic diversity of species? Do protected areas serve any useful purpose in this context? [2019/20m/2a]
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Last updated: 30 October 2026