Natural Vegetation — Set 4
Geography · प्राकृतिक वनस्पति · Questions 31–40 of 50
Natural vegetation refers to a plant community which has grown naturally without human aid and has been left undisturbed by humans for a long time. This is also called?
Correct Answer: B. Virgin vegetation
• **Virgin vegetation = natural plant community that grows without human intervention** and has remained undisturbed for a long time. • **Crops and orchards excluded** — human-aided cultivation like farming or orcharding is not counted as virgin vegetation. • 💡 Wrong-option analysis: Cultivated vegetation: human-planted crops; Domesticated vegetation: same issue; Hybrid vegetation: cross-bred plants, not natural.
Flora refers to?
Correct Answer: D. Plants of a particular region or period
• **Flora = plants of a particular region or period**, used in botany and ecology to describe all plant species of an area. • **Fauna = animal species** — the paired term to Flora, together representing a region's complete biological diversity. • 💡 Wrong-option analysis: Animal species: that is Fauna, not Flora; Human population: demographic term; Micro-organisms: separate domain, neither flora nor fauna by traditional classification.
Which of the following factors does NOT affect the natural vegetation of a place?
Correct Answer: B. Internet connectivity
• **Internet connectivity = does NOT affect natural vegetation**, which is shaped only by physical environmental factors. • **Land, soil, temperature, photoperiod, and precipitation** — the actual physical factors that determine type and density of forests. • 💡 Wrong-option analysis: Land: topography directly affects vegetation growth; Soil: nutrient and water retention affects plant types; Temperature: critical for species distribution zones.
The variation in duration of sunlight at different places is due to differences in latitude, altitude, and?
Correct Answer: A. Season
• **Season = causes variation in sunlight duration** (photoperiod), along with latitude and altitude. • **Faster tree growth in summer** — longer photoperiod in summer accelerates photosynthesis and growth rate. • 💡 Wrong-option analysis: Currency: economic concept, no relation to vegetation; Language: cultural, no effect on plants; Population: human demographic, unrelated to sunlight duration.
In India, almost the entire rainfall is brought in by the advancing southwest monsoon and retreating?
Correct Answer: A. Northeast monsoons
• **Northeast monsoon = retreating monsoon** that, combined with the advancing southwest monsoon, provides most of India's rainfall. • **Coromandel Coast gets rain from NE monsoon** — Tamil Nadu especially receives most of its rain from the retreating northeast monsoon. • 💡 Wrong-option analysis: Southeast monsoons: not an Indian meteorological term; Southern monsoons: not standard terminology; Western monsoons: not used in Indian climatology.
Which of the following is an environmental benefit of forests?
Correct Answer: C. They control soil erosion
• **Forests control soil erosion** by holding soil with their roots, regulating stream flow, and modifying local climate. • **Ecological balance** — forests are essential for maintaining water cycles, biodiversity, and atmospheric carbon balance. • 💡 Wrong-option analysis: Cause noise pollution: false, forests reduce noise; Increase temperature: false, forests cool the environment; Reduce rainfall: false, forests enhance rainfall through transpiration.
Tropical Evergreen forests are also called?
Correct Answer: C. Tropical Rain Forests
• **Tropical Evergreen forests = also called Tropical Rain Forests** because they occur in areas receiving very high rainfall. • **Western Ghats, Lakshadweep, and Upper Assam** — the three main locations in India where tropical rain forests are found. • 💡 Wrong-option analysis: Alpine Meadows: cold high-altitude grasslands; Tropical Thorn Forests: low rainfall semi-arid; Tropical Dry Forests: seasonal and rainfall-deficient.
Based on the availability of water, deciduous forests are further divided into?
Correct Answer: D. Moist and Dry
• **Deciduous forests = divided into Moist and Dry** based on the amount of rainfall received. • **Moist: 100–200 cm; Dry: 70–100 cm** — the rainfall thresholds separating the two deciduous sub-types. • 💡 Wrong-option analysis: High and Low: not a vegetation classification term; Salt and Fresh: refers to water bodies; Hot and Cold: temperature-based, not the standard deciduous classification.
Which of the following animals is commonly found in Tropical Deciduous forests?
Correct Answer: A. Lion
• **Lions, tigers, deer, elephants = common animals of Tropical Deciduous forests**, along with birds, lizards, and snakes. • **Rich diverse wildlife habitat** — the seasonal deciduous forests support a wide variety of Indian wildlife. • 💡 Wrong-option analysis: Camel: desert/arid zone animal; Walrus: Arctic marine mammal; Polar Bear: Arctic tundra, not found in India.
Pneumatophores (breathing roots) are a special feature of plants in which forest?
Correct Answer: C. Mangrove Forests
• **Pneumatophores = special breathing roots of Mangrove plants**, growing upward out of waterlogged anaerobic soil. • **Absorb oxygen from air** — these roots emerge above the water surface because the soil lacks oxygen for the plant's respiration. • 💡 Wrong-option analysis: Alpine Forests: cold dry habitat, no waterlogging; Evergreen Forests: well-drained soil, no pneumatophores needed; Thorn Forests: dry arid habitat, opposite conditions.