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Ecology MCQ

62 MCQ questions with answers and explanations · page 3 of 3

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Q51. If tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because-

  1. AThe soil of rain forest is deficient in nutrients
  2. BPropagules of the trees in a rain forest have poor viability
  3. CExotic species invade the fertile soil of rain forest
  4. DThe rain forest species are slow growing
Show answer & explanation

Answer: A) The soil of rain forest is deficient in nutrients

Q52. The Himalayan Range is very rich in species diversity.nWhich one among the following is the most appropriate reason for this phenomenon ?

  1. AIt has a high rainfall that supports luxuriant vegetative growth
  2. BIt is a confluence of different biogeographical bioms
  3. CExotic and invasive species have been introduced in this region
  4. DIt has less human interference
Show answer & explanation

Answer: B) It is a confluence of different biogeographical bioms

Q53. In dry regions, the leaf size of a tree becomes smaller. It is so to-

  1. AReduce metabolism
  2. BReduce transpiration
  3. CMaintain natural growth
  4. DProtect plant from animals
Show answer & explanation

Answer: B) Reduce transpiration

Q54. Eco-mark is given to an Indian product which is :

  1. ARich in protein
  2. BEnvironment friendly
  3. CEconomically viable
  4. DPure and unadulterated
Show answer & explanation

Answer: B) Environment friendly

Q55. No trees are found in Tundra biome near polar region of northern hemisphere. This is due to-

  1. ASnowfall inhibits plant respiration
  2. BFrozen ice beneath the surface soil restricts root growth
  3. CLess wind movement and inadequate sun light
  4. DLow temperature which restricts development of reproductive organs.
Show answer & explanation

Answer: B) Frozen ice beneath the surface soil restricts root growth

Q56. an artificial ecosystem is represented by-

  1. APisciculture tank
  2. BAgricultural land
  3. CZoo
  4. DAquarium
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Answer: D) Aquarium

Q57. The world's only floating national park is situated in-

  1. AManipur
  2. BKualalumpur
  3. CBilaspur
  4. DDispur
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Answer: A) Manipur

Q58. Van Mahotsav is associated with-

  1. AProtection of plant
  2. BPlanting tree
  3. CIncrease in crop
  4. DCutting trees
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Answer: B) Planting tree

Q59. Crop sown soon after the onset of south- wst monsoon in India is called-

  1. ARabi
  2. BKharif
  3. CRainfed
  4. DDry farming
Show answer & explanation

Answer: B) Kharif

Q60. Long roots system are found in xerophytes, because-

  1. AIt give mechanical support to plant
  2. BTo absorb water situated deep inside earth
  3. CHigh temperature of soil cause growth in root
  4. DHow temperature during night cause growth on root
Show answer & explanation

Answer: B) To absorb water situated deep inside earth

Q61. Which is the miost stable ecosystem ?

  1. ADesert
  2. BOcean
  3. CMountain
  4. DForest
Show answer & explanation

Answer: B) Ocean

Q62. In biological terms,…….is a relationship between two organisms in which one organism benefits and the other is unaffected.

  1. AParasitism
  2. BCommensalism
  3. CAmensalism
  4. DMutualism
Show answer & explanation

Answer: B) Commensalism

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