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2000 · Q126Environment & EcologyEcosystems & Ecology Conceptseasy

Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called

  1. (a)Keystone species
  2. (b)Allopatric species
  3. (c)Sympatric species
  4. (d)Threatened species
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Official answer(a) Keystone species

2026 · Q33Environment & EcologyEcosystems & Ecology Conceptsmoderate

Which of the following best explain(s) the rationale for protecting mangrove ecosystems in the context of climate resilience ? 1. Mangroves reduce tidal energy and store freshwater, making them ideal sites for paddy cultivation in saline estuarine belts. 2. Their salt-sensitive roots filter seawater, making mangroves key to converting coastal land into freshwater aquaculture zones. 3. By withstanding tidal surges and offering biomass resources, mangroves function both as natural bio-shields and livelihood bases for rural communities. Select the answer using the code given below :

  1. (a)1 only
  2. (b)1 and 2
  3. (c)2 and 3
  4. (d)3 only
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Official answer(d) 3 only

2023 · Q10Environment & EcologyEcosystems & Ecology Conceptseasy

With reference to India’s projects on connectivity, consider the following statements : 1. East-West Corridor under Golden Quadrilateral Project connects Dibrugarh and Surat. 2. Trilateral Highway connects Moreh in Manipur and Chiang Mai in Thailand via Myanmar. 3. Bangladesh-China-India-Myanmar Economic Corridor connects Varanasi in Uttar Pradesh with Kunming in China. How many of the above statements are correct?

  1. (a)Only one
  2. (b)Only two
  3. (c)All three
  4. (d)None
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Official answer(d) None