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Ecosystem : Biology (Class 12th) Revision test | MCQs for NEET
Q1. Best soil for plant growth is:
A) Grit
B) Sandy
C) Soily
D) Clay
Answer: (D) Clay
Best soil for plant growth is Clay
Q2. Soil particle determine the character of
A) Organisation
B) Biomass
C) Area capacity
D) Soil plants
Answer: (A) Organisation
Soil particle determine the character of Organisation
Q3. Plant roots soil water is
A) Cellular water
B) Surface water
C) Humidity water
D) Gravitational water
Answer: (D) Gravitational water
Plant roots soil water is Gravitational water
Q4. Exchange of water in submerged plant
A) Stomata
B) Normal surface
C) Hydathode
D) Lenticel
Answer: (B) Normal surface
Q5. Submerged Rooted Hydrophyte are:
A) Uticularia
B) Prapa
C) Nymphea
D) vallisnaria
Answer: (D) vallisnaria
Submerged Rooted Hydrophyte are known as vallisnaria
Q6. Water co-deficient contains:
A) Large thin walled cells
B) Large-vacuoles
C) Membrane
D) All of these
Answer: (C) Membrane
Water co-deficient contains Membrane
Q7. Xerophyte Contains
A) Deep roots
B) Sunken stomata
C) Thick cuticle
D) All of these
Answer: (D) All of these
Q8. Small extremite animals of tropical region
A) Allen’s law
B) Bergmen’s law
C) Dollo’s law
D) Cope’s law
Answer: (D) Cope’s law
It is associated with Cope’s law.
Q9. Hibernation of some animals
A) Regular
B) Periodic
C) Suddenly
D) Temporary
Answer: (A) Regular
Q10. Physical and chemical properties of soil studied by
A) Climatic factor
B) Biotic factor
C) Soil factor
D) Topographic factor
Answer: (B) Biotic factor
It is studied by Biotic factor
Q11. Identity the Hetero Organism
A) Pistia
B) Hydrilla
C) Vallisnaria
D) Casurina
Answer: (C) Vallisnaria
Vallisnaria
Q12. That animal who can bear one third loss of water of one third body weight is
A) Necturus
B) Camel
C) Wall Lizzard
D) Kyton
Answer: (B) Camel
Camel can bear one third loss of water of one third body weight.
Q13. Root hair absent in
A) Hydrophyte
B) Halophyte
C) Mesophyte
D) Heliophyte
Answer: (A) Hydrophyte
Root hair absent in Hydrophyte.
Q14. A water co-efficient Mesophyte is
A) Cappais
B) Agave
C) Acacia
D) Hemeris
Answer: (B) Agave
A water co-efficient Mesophyte is Agave.
Q15. Gravitated carried soil is
A) Alluvial
B) Muddy
C) Glacier
D) Compound
Answer: (D) Compound
Gravitated carried soil is Compound
Q16. Kanha National Park is famous for
A) For Birds
B) For Tendua
C) For Tiger
D) For Crocodile
Answer: (B) For Tendua
It is famous for Tendua
Q17. During food chain the maximum energy is stored in
A) Producers
B) Decomposers
C) Herbivoures
D) Camivourse
Answer: (A) Producers
During food chain the maximum energy is stored in Producers
Q18. The average efficiency of energy transfer from herbivoure to carnivorce level is
A) 5%
B) 10%
C) 20%
D) 30%
Answer: (B) 10%
10%
Q19. Ecological pyramids were first devised by
A) Charles Eltom
B) R. Hesse
C) R.A. Lindemann
D) Justus von Liebig
Answer: (A) Charles Eltom
Ecological pyramids were first devised by Charles Eltom
Q20. Which of the following ecosystem has highest gross primary productivity
A) Grassland
B) Coral reefs
C) Mangrooves
D) Rainforests
Answer: (B) Coral reefs
Coral reefs has highest gross primary productivity
Q21. In the phosphorus cycle, weathring makes phosophate available first to
A) Producers
B) Decomposers
C) Consumers
D) None of these
Answer: (A) Producers
Producers
Q22. Which types of the following pyramid are never inverted?
A) Pyramid of energy
B) Pyramid of biomass
C) Pyramid of number
D) Pyramid of dry biomass
Answer: (A) Pyramid of energy
Pyramid of energy
Q23. Biosphere means
A) Atmosphere
B) Lithosphere and ionosphered
C) Atmosphere, lithosphere and hydrosphere
D) Hydrosphere lithosphere and ionsophere
Answer: (C) Atmosphere, lithosphere and hydrosphere
Atmosphere, lithosphere and hydrosphere
Q24. Best type of pyramid which is always true is:
A) Pyramid or energy
B) Pyramid of Biomass
C) Pyramid of number
D) Both (a) and (c)
Answer: (A) Pyramid or energy
Pyramid or energy
Q25. decomposers are
A) Autotrophs
B) Autohetrotrophs
C) Organotrophs
D) Heterotrophs
Answer: (D) Heterotrophs
Heterotrophs
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