Q.1
Both hydrarch and xerarch succession lead to .... .... [C.B.S.E. 2011]
  • a) Medium water conditions
  • b) Excessive wet conditions
  • c) Xeric conditions
  • d) Highly dry conditions
Q.2
Abundance of species population within its habitat is .... .... [A.I.I.M.S.2002]
  • a) Absolute density
  • b)Regional density
  • c) Relative density
  • d) Niche density
Q.3
An example of mutualism is .... .... [Bih.P.M.T. 1996]
  • a) Riccia
  • b) Selaginella
  • c) Lichen
  • d) Spirogyra
Q.4
Which is not characteristic of intestinal symbionts? .... .... [C.E.T.Chd2000]
  • a) Feeding on extra food for host
  • b) Providing vitamins to host
  • c) Anaerobic respiration
  • d) Aerobic respiration
Q.5
The size of clay particles is .... ..... [ DPMT 2008]
  • a) Less than 0.002 mm
  • b) More than 0.002 mm
  • c) 0.2 mm to 2 mm
  • d) None of the above
Q.6
Birth rate is 100, death rate isNumbers of individual in population group isWhat is the percentage of natural growth rate? .... .... [Guj.C.E.T.2006]
  • a) 0.09%
  • b) 9.0%
  • c) 0.9%
  • d) 90%
Q.7
Which of the following is wrongly matched? .... .... [Kerala 2005]
  • a) Temperature zone 20 - 40 latitude
  • b) Hypolimnion - Thermal stratification in lakes
  • c) Ozone layer - Stratosphere
  • d) Profundal zone - Dark zone
Q.8
The factor related to structure of earth surface is ..... .... [B.H.U.1995]
  • a) Edaphic
  • b) Biotic
  • c) Temperature
  • d) Topographic
Q.9
Stronger homeostasis in an ecosystem refers to .... .... [C.E.T.Chd2009]
  • a) self regulatory mechanism
  • b) Feed back mechanism
  • c) Influence of productivity
  • d) State of equilibrium
Q.10
What does the following sequences represent: Blue → Green algae → Crustose→ Lichens → Foliose lichens → Mosses → Shrubs → Dicotyledonous trees? [C.P.M.T. 1989]
  • a) A food pyramid
  • b) Ecological succession
  • c) Genetic drift
  • d) Phylogenetic trend
Q.11
Carrying capacity is determined by .... .... [Odisha 2009]
  • a) Limiting resources
  • b) Mortality rate
  • c) Natality rate
  • d) Predation
Q.12
Keystone species is .... .. [ AIIIMS 2007]
  • a) Always dominant
  • b) Useful in maintain structure and function of biotic community
  • c) With maximum biomass
  • d) All the above
Q.13
Plants and animals living in a particular area constitute .... .... [C.P.M.T. 1998]
  • a) Flora and fauna
  • b) Community
  • c) Ecosystem
  • d) Ecology
Q.14
Plants obtaining nourishment from other plants by haustoria are .... .... [Har.PM.T. 1998]
  • a) Epiphytes
  • b) Parasites
  • c) Xerophytes
  • d) Halophytes
Q.15
Maximum survival and reproductive capacity shown by a population under optimal conditions is .... ..... [J.K.C.M.E.E. 2011]
  • a) Carrying capacity
  • b) Natality
  • c) Biotic potential
  • d) Vitality
Q.16
Rhizosphere microflora exhibits ..... ..... [C.E.T.Chd 2010]
  • a) Symbiosis
  • b) Parasitism
  • c) Commensalism
  • d) Space parasitism
Q.17
Under unfavorable conditions many zooplankton species in lakes and ponds enters .... .... [H.P.P.M.T. 2010,2011]
  • a) Diapause
  • b) Hibernation
  • c) Aestivation
  • d) None of the above
Q.18
Which is most correctly matched .... .... [C.B.S.E.2004]
  • a) Laterite - Contains aluminium
  • b) Terra rosa - Most suitable for roses
  • c) Chernozem - Richest soil
  • d) Black cotton soil - rich in calcium carbonate
Q.19
Two different types of plant species living together at a place .... .... [R.P.M.T. 2002]
  • a) Plantcoenosis
  • b) Zoocoenosis
  • c) Plant community
  • d) Ecotype
Q.20
Aerenchyma occurs in .... ..... [Odisha 2009]
  • a) Epiphytes
  • b) Halophytes
  • c) Hydrophytes
  • d) Xerophytes
Q.21
Which gas of the atmosphere holds up ultraviolent rays .... .... [C.P.M.T.1994]
  • a) O2
  • b) O3
  • c) N2
  • d) CO2
Q.22
The correct order of succession is xerarch is .... .... [Kerala 2006]
  • a) Annual herbs stage, perennial herbs stage, lichen moss stage, scrub stage, forest
  • b) Perennial herbs stage, annual herbs stage, lichen moss stage, scrub stage. forest
  • c) Lichen moss stage, annual herbs stage, perennial herbs stage, scrub stage, forest
  • d) Forest, scrub stage, annual herbs stage, perennial herbs stage, lichen moss stage
Q.23
Edaphology is connected with .... .... [D.P.M.T.1999]
  • a) Plant and biosphere
  • b) Soil and living micro-organisms
  • c) Animals and ecosystem
  • d) Soil and biosphere
Q.24
Fresh water bony fishes maintain water balance by .... ..... [B.H.U.2012]
  • a) Excreting hypotonic urine.
  • b) Excreting wastes as uric acid.
  • c) Drinking small amount of water.
  • d) Excreting salt across their gills.
Q.25
Sun loving plants are .... .... [C.P.M.T.1998]
  • a) Halophytes
  • b) Sciophytes
  • c) Heliophytes
  • d) Autotrophs
Q.26
Transition zone between two communities is .... .... [C.P.M.T. 2001]
  • a) Ecotone
  • b) Ecad
  • c) Ecotype
  • d) Keystone
Q.27
Percentage ratio of natality over mortality is .... .... [Pb.P.M.T. 2007]
  • a) Population dynamics
  • b) Vital index
  • c) Population density
  • d) Total count
Q.28
Instrument used for measuring wind velocity is .... .... [M.P.P.M.T.2004]
  • a) Anemometer
  • b) Hydrometer
  • c) Lactometer
  • d) Photometer
Q.29
Clay particles are .... .... [E.A.M.C.E.T.2002]
  • a) Positively charged
  • b) Negatively charged
  • c) Electrically neutral
  • d) Without any charge
Q.30
Microscopic aquatic organisms lacking locomotory ability and drifting with water current are .... .... [A.M.U. 2010]
  • a) Pleuston
  • b) Nekton
  • c) Plankton
  • d) Seston
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