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Ecology MCQ

62 MCQ questions with answers and explanations · page 2 of 3

Test yourself▶ 25 question test▶ 50 question test

Q26. In a food chain energy transfer-

  1. AFrom river to earth
  2. BLower lattitude to higher lattitude
  3. CFrom one organism to other organism
  4. DNone of these
Show answer & explanation

Answer: C) From one organism to other organism

Q27. Hydrophytes are-

  1. AAnimal found in sea
  2. BAquatic plant
  3. CA plant disease
  4. DA root less plant
Show answer & explanation

Answer: B) Aquatic plant

Q28. Which one of following is a xerophytic plant ?

  1. AMustard
  2. BAmerbel
  3. CKaril
  4. DNeem
Show answer & explanation

Answer: C) Karil

Q29. Abiotic component of our environment-

  1. APlants
  2. BAnimal
  3. CBoth a and b
  4. DAir
Show answer & explanation

Answer: D) Air

Q30. Hydrophonics is related to-

  1. AGrowth of plant without soil
  2. BGrowth of plant without water
  3. CConservation of water
  4. DRelation of sound with water
Show answer & explanation

Answer: A) Growth of plant without soil

Q31. Epiphytes are are plant which depent on other plants for :

  1. AFood
  2. BMechanical support
  3. CShade
  4. DWater
Show answer & explanation

Answer: B) Mechanical support

Q32. Phytotron is a facility to-

  1. AGrow plants
  2. Bunder disease free condition
  3. CGrow plant under controlled condition
  4. DInduced mutations
Show answer & explanation

Answer: C) Grow plant under controlled condition

Q33. Most of the desert plant bloom during night because-

  1. ATheir blooming is controlled by low templerature
  2. BThey are sensitive to the phase of moon
  3. CThe desert insects eat away flower during day time
  4. DThe desert insects are active during night time
Show answer & explanation

Answer: D) The desert insects are active during night time

Q34. The ratio of forest area needed for ecologycal balance in India-

  1. A11.1%
  2. B22.2%
  3. C33.3%
  4. D44.4%
Show answer & explanation

Answer: C) 33.3%

Q35. Which of the following is most stable ecosystem ?

  1. AForest
  2. BGrass land
  3. CDesert
  4. DSea
Show answer & explanation

Answer: D) Sea

Q36. Centre for Ecological Sciences is situated at-

  1. ANew Delhi
  2. BAllahabad
  3. CKarnal
  4. DBengaluru
Show answer & explanation

Answer: D) Bengaluru

Q37. Ecosystem is-

  1. AAlways open
  2. BAlways closed
  3. CBoth open closed depending upon community
  4. DBolth open and closed depending upon biomass
Show answer & explanation

Answer: C) Both open closed depending upon community

Q38. Which of the following are examples of carnivorous plants ?

  1. ASundew Venus fly trap, Pitcher plant
  2. BCuscuta, Rafflesia, Mistletoe
  3. CSandalwood tree, Broom rape, Pitcher plant
  4. DCuscuta, Bladderwort, Mistletoe
Show answer & explanation

Answer: A) Sundew Venus fly trap, Pitcher plant

Q39. In a food chain man is-

  1. AProducer
  2. BOnly primary consumer
  3. COnly secondary consumer
  4. DPrimary as well as secondary consumer
Show answer & explanation

Answer: D) Primary as well as secondary consumer

Q40. 10% law of energy transfer in food chain was given by-

  1. ALindemann
  2. BStanley
  3. CTansley
  4. DWeismann
Show answer & explanation

Answer: A) Lindemann

Q41. Amount of energy transferred from one trophic level to next is-

  1. A1.5%
  2. B10%
  3. C15%
  4. D20%
Show answer & explanation

Answer: B) 10%

Q42. Plant and animal living in a particular area constitute-

  1. AFlora and Fauna
  2. BCommunity
  3. CEcosystem
  4. DEcology
Show answer & explanation

Answer: B) Community

Q43. Study of inter-relationships between an entire community and its environment is-

  1. AAutecology
  2. BResource ecology
  3. CSpecies ecology
  4. DSynecology
Show answer & explanation

Answer: D) Synecology

Q44. An association of individuals of different species living in the same habitat and having functional interactions is :

  1. APopulation
  2. BEcological niche
  3. CBIotic community
  4. DEcosystem
Show answer & explanation

Answer: C) BIotic community

Q45. The importance of ecosystem lies is-

  1. ACycling of material
  2. BFlow of energy
  3. CBoth A & B
  4. DIts biomass
Show answer & explanation

Answer: C) Both A & B

Q46. Energy transfer from organism to organism in a natural community develops-

  1. ABiological control
  2. BFood chain
  3. CFood web
  4. DPyramid of energy
Show answer & explanation

Answer: C) Food web

Q47. Flow of energy declines as it is passes from lower to higher trophic level. This is explained by-

  1. AFirst law of thermodynamics
  2. BSecond law of thermodynamics
  3. CNewton's second law
  4. DNewton's third law
Show answer & explanation

Answer: B) Second law of thermodynamics

Q48. Pyramid of energy in a ecosystem is-

  1. AAlways inverted
  2. BAlways upright
  3. CSpindle shape
  4. DBoth upright and inverted depending upon ecosystem
Show answer & explanation

Answer: B) Always upright

Q49. B-Diversity is also known as-

  1. AGlobal diversity
  2. BEcosystem diversity
  3. CBetween habitat diversity
  4. DWithin habital diversity
Show answer & explanation

Answer: B) Ecosystem diversity

Q50. Which one of the following organisms is likely to show the highest concentration of DDT, one it has been introduce into the ecosystem-

  1. AGrasshopper
  2. BToad
  3. CSnake
  4. DCattle
Show answer & explanation

Answer: C) Snake

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