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Ecosystem : Biology (Class 12th) Revision Test | MCQs For NEET

25 Questions 8 Attempts 4.06K Seen
This practice test includes 25 important multiple-choice questions (MCQs) from the chapter Ecosystem in Biology (Class 12). the best boost for neet other competitive entrance exams. Start Test without Login in
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Q.1. Best soil for plant growth is:

  1. Grit
  2. Sandy
  3. Soily
  4. Clay

Q.2. Soil particle determine the character of

  1. Organisation
  2. Biomass
  3. Area capacity
  4. Soil plants

Q.3. Plant roots soil water is

  1. Cellular water
  2. Surface water
  3. Humidity water
  4. Gravitational water

Q.4. Exchange of water in submerged plant

  1. Stomata
  2. Normal surface
  3. Hydathode
  4. Lenticel

Q.5. Submerged Rooted Hydrophyte are:

  1. Uticularia
  2. Prapa
  3. Nymphea
  4. vallisnaria

Q.6. Water co-deficient contains:

  1. Large thin walled cells
  2. Large-vacuoles
  3. Membrane
  4. All of these

Q.7. Xerophyte Contains

  1. Deep roots
  2. Sunken stomata
  3. Thick cuticle
  4. All of these

Q.8. Small extremite animals of tropical region

  1. Allen’s law
  2. Bergmen’s law
  3. Dollo’s law
  4. Cope’s law

Q.9. Hibernation of some animals

  1. Regular
  2. Periodic
  3. Suddenly
  4. Temporary

Q.10. Physical and chemical properties of soil studied by

  1. Climatic factor
  2. Biotic factor
  3. Soil factor
  4. Topographic factor

Q.11. Identity the Hetero Organism

  1. Pistia
  2. Hydrilla
  3. Vallisnaria
  4. Casurina

Q.12. That animal who can bear one third loss of water of one third body weight is

  1. Necturus
  2. Camel
  3. Wall Lizzard
  4. Kyton

Q.13. Root hair absent in

  1. Hydrophyte
  2. Halophyte
  3. Mesophyte
  4. Heliophyte

Q.14. A water co-efficient Mesophyte is

  1. Cappais
  2. Agave
  3. Acacia
  4. Hemeris

Q.15. Gravitated carried soil is

  1. Alluvial
  2. Muddy
  3. Glacier
  4. Compound

Q.16. Kanha National Park is famous for

  1. For Birds
  2. For Tendua
  3. For Tiger
  4. For Crocodile

Q.17. During food chain the maximum energy is stored in

  1. Producers
  2. Decomposers
  3. Herbivoures
  4. Camivourse

Q.18. The average efficiency of energy transfer from herbivoure to carnivorce level is

  1. 5%
  2. 10%
  3. 20%
  4. 30%

Q.19. Ecological pyramids were first devised by

  1. Charles Eltom
  2. R. Hesse
  3. R.A. Lindemann
  4. Justus von Liebig

Q.20. Which of the following ecosystem has highest gross primary productivity

  1. Grassland
  2. Coral reefs
  3. Mangrooves
  4. Rainforests

Q.21. In the phosphorus cycle, weathring makes phosophate available first to

  1. Producers
  2. Decomposers
  3. Consumers
  4. None of these

Q.22. Which types of the following pyramid are never inverted?

  1. Pyramid of energy
  2. Pyramid of biomass
  3. Pyramid of number
  4. Pyramid of dry biomass

Q.23. Biosphere means

  1. Atmosphere
  2. Lithosphere and ionosphered
  3. Atmosphere, lithosphere and hydrosphere
  4. Hydrosphere lithosphere and ionsophere

Q.24. Best type of pyramid which is always true is:

  1. Pyramid or energy
  2. Pyramid of Biomass
  3. Pyramid of number
  4. Both (a) and (c)

Q.25. decomposers are

  1. Autotrophs
  2. Autohetrotrophs
  3. Organotrophs
  4. Heterotrophs
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