Ecosystem MCQ Questions & Answers in Botany

71. The term ecosystem was coined by

A E.P. Odum

B A.G. Tansley

C E.Haeckel

D E. Warming

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72. The rate of formation of new organic matter by rabbit in a grassland, is called

A net productivity

B secondary productivity

C net primary productivity

D gross primary productivity

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73. Both, hydrarch and xerarch successions lead to:

A medium water conditions

B xeric conditions

C highly dry conditions

D excessive wet conditions

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74. The breakdown of detritus into smaller particles by earthworm is a process called

A humification

B fragmentation

C mineralisation

D catabolism

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75. Niche is

A all the biological factors in the organism's environment

B the physical space where an organism lives

C the functional role played by the organism where it lives

D the range of temperature that the organism needs to live

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76. The mass of living material at a trophic level at a particular time is called :

A Standing state

B Net primary productivity

C Standing crop

D Gross primary productivity

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77. Pyramid of numbers deals with number of

A species in an area

B individuals in a community

C individuals in a tropic-level

D subspecies in a community

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78. The transfer of energy from one trophic level to another is governed by the $$2^{nd}$$ law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is

A 5%

B 10%

C 25%

D 50%

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79. Greatest producers of organic matter are

A crop plants

B forests

C plants of the land area

D phytoplankton of oceans

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80. In grass-deer-tiger food chain, grass biomass is one tonne. The tiger biomass shall be

A $$100\,kg$$

B $$10\,kg$$

C $$200\,kg$$

D $$1\,kg$$

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71. The term ecosystem was coined by

72. The rate of formation of new organic matter by rabbit in a grassland, is called

73. Both, hydrarch and xerarch successions lead to:

74. The breakdown of detritus into smaller particles by earthworm is a process called

75. Niche is

76. The mass of living material at a trophic level at a particular time is called :

77. Pyramid of numbers deals with number of

78. The transfer of energy from one trophic level to another is governed by the $$2^{nd}$$ law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is

79. Greatest producers of organic matter are

80. In grass-deer-tiger food chain, grass biomass is one tonne. The tiger biomass shall be

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