UPSC 2003 Geography Questions with Answers

Explanation

The time a planet takes to complete one revolution around the Sun depends on its distance from the Sun. Planets farther from the Sun have larger orbits, resulting in longer revolution periods.

Option (b) is correct: Jupiter takes the longest time among the given options to orbit the Sun, requiring approximately 4,333 days(11.86 Earth years). This is due to its significantly larger orbital path compared to the other planets listed. Hence, this is the correct answer. Options (a), (c) and (d) are incorrect:

Earth completes one revolution around the Sun in approximately 365.25 days, which is relatively short compared to the other options provided. Mars requires around 687 days(1.88 Earth years) to complete a revolution. While this is longer than Earth’s revolution time, it is still shorter than that of Jupiter. Venus has the shortest revolution period among the listed planets, taking approximately 224.7 Earth days(0.615 years) to orbit the Sun.

Explanation

Assertion (A) is true: The amount of atmospheric moisture varies with latitude because temperature differences across latitudes influence evaporation and condensation. Near the Equator, high temperatures increase evaporation rates, allowing the atmosphere to hold more water vapor, resulting in higher moisture content. In polar regions, lower temperatures reduce evaporation, leading to minimal moisture in the air. Reason (R) is true: The capacity of air to hold moisture is directly related to its temperature. Warmer air has a greater capacity to retain water vapor, while colder air can hold much less moisture. Since temperature is latitude-dependent, atmospheric moisture content is indirectly influenced by latitude. Reason (R) explains Assertion (A): Because temperature, which is dependent on latitude, determines the air’s ability to hold water vapor. This explains the variation in atmospheric moisture content across latitudes, with tropical regions being more humid and polar regions drier.

Explanation

Primary productivity refers to the rate at which plants and other photosynthetic organisms produce organic compounds from carbon dioxide and sunlight, forming the base of the food chain in an ecosystem. Assertion (A) is false: While temperate forest soils are generally richer in nutrients due to slower decomposition rates and seasonal leaf litter, tropical rainforest soils are nutrient-poor. The rapid decomposition in tropical rainforests causes nutrients to be quickly absorbed by the dense vegetation, leaving the soil itself infertile. Once the forest is cleared, the exposed soil is rapidly depleted due to erosion and leaching from heavy rains, making sustained agriculture difficult without chemical inputs. Reason (R) is true: The primary productivity (the rate at which plants convert sunlight into energy through photosynthesis) of tropical rainforests is indeed very high compared to temperate forests. This is due to consistent warm temperatures, high rainfall, and abundant sunlight year-round, which promote continuous plant growth. However, this high productivity is linked to the forest’s ecosystem, not the soil’s fertility.

Explanation

Assertion (A) is true: Areas located within 5° to 8° latitude on either side of the Equator, often influenced by the Intertropical Convergence Zone (ITCZ), experience year-round rainfall due to persistent solar heating and moisture-laden air masses. The ITCZ is a region where the northeast and southeast trade winds converge, causing warm, humid air to rise continuously. This rising air cools and condenses, leading to frequent cloud formation and precipitation. The consistent high temperatures in these regions enhance evaporation, while the abundant moisture ensures that convectional rainfall occurs almost daily, particularly in the afternoons when the ground has heated the most. Reason (R) is true: Convectional rainfall is characteristic of equatorial regions. High temperatures during the day cause the surface air to heat up and rise (convection), cooling as it ascends, leading to afternoon rainfall. This process is driven by the intense solar heating and high humidity near the Equator. Reason(R) explains Assertion(A): Because the continuous rainfall near the Equator is a direct result of high temperatures and convectional rain, which occurs due to the daily cycle of heating and cooling.

Explanation

Option (a) is correct: Temperate coniferous forests dominate due to their vast distribution in the boreal or taiga zones, covering large parts of North America, Europe, and Asia. They thrive in cold climates and represent the largest biome by area, accounting for the highest percentage of forest cover worldwide. Options (b), (c), and (d) are incorrect:

Temperate Deciduous Forests: Found in areas with distinct seasons, like eastern North America, Europe, and East Asia, but their global coverage is smaller than that of coniferous forests. Tropical Monsoon Forests: Found in regions with monsoon climates (seasonal rainfall) like parts of Asia and Africa, they cover a smaller area compared to temperate coniferous forests. Tropical Rain Forests: Found near the Equator, these forests are rich in biodiversity but are geographically restricted to regions like the Amazon Basin, Congo Basin, and Southeast Asia.

Explanation

Assertion (A) is true: The eastern coastal states (West Bengal, Odisha, Andhra Pradesh, Tamil Nadu) are among the largest rice-producing regions in India. The western coastal region (Maharashtra, Goa, Karnataka, Kerala) produces comparatively less rice due to limited lowland areas suitable for large-scale paddy cultivation. Reason (R) is false: The western coast (Konkan, Malabar) receives higher rainfall than the eastern coast due to the south-west monsoon and orographic effect of the Western Ghats. The eastern coast receives sufficient rainfall, mainly from the south-west monsoon (except Tamil Nadu, which depends on the northeast monsoon). Additionally, major rivers like the Ganga, Godavari, Krishna, and Kaveri provide irrigation, supporting rice cultivation.

Explanation

Statement 1 is correct: The Indian subcontinent is indeed the original home of the cotton plant. The Neolithic Site of Mehrgarh near Bolan Pass in Balochistan region of Pakistan has the oldest evidence of cotton. Many Harappan sites provide evidence of cotton cultivation.

Statement 2 is correct: The first commercial cotton hybrid was Hybrid-4 (H-4), developed by Indian scientist Chandrakant T. Patel in 1970. This hybrid was created by crossing the Gujarat-67 variety with the American variety. These hybrids offer advantages like higher yields, improved resistance to pests and diseases, and better adaptability to diverse climatic conditions.

Explanation

The Genetic Engineering Appraisal Committee (GEAC) is the regulatory body responsible for granting environmental release of genetically modified (GM) crops like Bt Cotton in India, while the final approval for commercial cultivation is decided by the central government. It functions under the Ministry of Environment, Forest and Climate Change (MoEFCC). It was established under the 1989 Rules, which were framed under the Environment Protection Act, 1986. It oversees the safety assessment of GM crops before their commercial release. Final approvals for cultivation are based on GEAC’s recommendations, but the central government makes the final decision after considering inputs from other stakeholders like the Indian Council of Agricultural Research (ICAR) and the Ministry of Agriculture."

Explanation

Statement 1 is incorrect: India was the second-largest producer of fruits after Brazil in 2003-04. According to the Food and Agriculture Organization (FAO) of the United Nations, this trend continued, and in 2019, India remained the world’s second-largest producer of both fruits and vegetables.

Statement 2 is incorrect: Ranked by volume, Zimbabwe, China, India (3rd), and Malawi were major exporters of tobacco in 2002. However by 2021-22, India was the second largest tobacco producer behind China and India was the 2nd largest exporter of tobacco behind Brazil.

Explanation

Amongst the given, In 2003 as well as the in the latest ranking Japan had the highest life expectancy in the world. The highest average life expectancy countries according to statista are-Monaco > Republic of Korea (South Korea) > China (Hongkong) > Spain > Malta > Israel. In India, life expectancy at birth (years) has improved from 63 years in 2000 to 67.3 years in 2021. Comparison of option countries:

Country Life Expectancy (Approx.) Canada ~83.9 years Germany ~81.5 years Japan ~85.2 years Norway ~83.3 years