The luxuriant growth of natural vegetation in tropical rainforest is d

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The luxuriant growth of natural vegetation in tropical rainforest is due to

  • 1. fertile soil.
  • 2. hot and wet climate throughout the year.
  • 3. intense sunlight for photosynthesis.
  • 4. seasonal change to facilitate nutrient absorption.

Select the correct answer using the code given below :

1 and 4 only
2 and 3 only
1, 2 and 3 only
1, 2, 3 and 4
This question was previously asked in
UPSC NDA-1 – 2015
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Tropical rainforests are characterized by consistently high temperatures and abundant rainfall throughout the year.
Statement 2 (hot and wet climate throughout the year) provides the ideal temperature and moisture conditions for rapid plant growth. Statement 3 (intense sunlight for photosynthesis), due to their location near the equator, ensures high energy input for primary production. Statement 1 (fertile soil) is generally incorrect; rainforest soils are often poor in nutrients as rapid decomposition and uptake mean most nutrients are stored in the biomass, not the soil. Statement 4 (seasonal change) is incorrect; tropical rainforests exhibit minimal seasonal temperature and rainfall variation compared to other biomes, and nutrient cycling is continuous.
The combination of high temperature, high humidity, and intense sunlight creates a highly productive environment for vegetation growth. The limiting factor is usually not climate or light, but rather nutrient availability, which is compensated for by efficient nutrient cycling within the ecosystem.

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