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My Question Performance Summary in Full Tests !
Questions Available: 26
Questions Attempted: 10
Number of Attempts: 15
Correct Attempts: 8
Total Time Spent: 00:30
Avg Time Per Question: 00:02
My Question Performance Summary in Full Tests
Which of the following is the unit of productivity of an Ecosystem?
(1). (I) (KCal m-2)yr-1
(2). gm-2
(3). KCal m-2
(4). KCal m-3
(1). (I) (KCal m-2)yr-1
(2). gm-2
(3). KCal m-2
(4). KCal m-3
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Given below are twol statements
Statement I : In ecosystem, there is unidirectional flow of energy of sun from producers to consumers.
Statement II : Ecosystems are exempted from 2nd law of thermodynamics.
In the light of the above statements, choose the most appropriate answer from the options given below :
(1). Statement I is incorrect but statement II is correct
(2). Both statement I and statement II are correct
(3). Both statement I and statement II are incorrect
(4). Statement I is correct but statement II is incorrect
Statement I : In ecosystem, there is unidirectional flow of energy of sun from producers to consumers.
Statement II : Ecosystems are exempted from 2nd law of thermodynamics.
In the light of the above statements, choose the most appropriate answer from the options given below :
(1). Statement I is incorrect but statement II is correct
(2). Both statement I and statement II are correct
(3). Both statement I and statement II are incorrect
(4). Statement I is correct but statement II is incorrect
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Given below are two statements:
Statement I : The primary source of energy in an ecosystem is solar energy.
Statement Il: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
In the light of the above statements, choose the most appropriate answer from the options given below :
(1). Statement I is incorrect but statement Il is correct
(2). Both statement I and statement Il are correct
(3). Both statement I and statement Il are incorrect
(4). Statement I is correct but statement Il is incorrect
Statement I : The primary source of energy in an ecosystem is solar energy.
Statement Il: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
In the light of the above statements, choose the most appropriate answer from the options given below :
(1). Statement I is incorrect but statement Il is correct
(2). Both statement I and statement Il are correct
(3). Both statement I and statement Il are incorrect
(4). Statement I is correct but statement Il is incorrect
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x(kcal m-2)yr-1, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
(1). \(10x\left(kcal m^{-2}\right)yr^{-1}\)
(2). \(\displaystyle \frac{100x}{3x}\left(kcal m^{-2}\right)yr^{-1}\)
(3). \(\displaystyle \frac{x}{10}\left(kcal m^{-2}\right)yr^{-1}\)
(4). \(x\left(kcal m^{-2}\right)yr^{-1}\)
(1). \(10x\left(kcal m^{-2}\right)yr^{-1}\)
(2). \(\displaystyle \frac{100x}{3x}\left(kcal m^{-2}\right)yr^{-1}\)
(3). \(\displaystyle \frac{x}{10}\left(kcal m^{-2}\right)yr^{-1}\)
(4). \(x\left(kcal m^{-2}\right)yr^{-1}\)
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Identify the correct statements:
A. Detrivores perform fragmentation.
B. The humus is further degraded by some microbes during mineralization.
C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
D. The detritus food chain begins with living organisms.
E. Earthworms break down detritus into smaller particles by a process called catabolism.
Choose the correct answer from the option given below :
(1). B,C, D only
(2). C, D, E only
(3). D, E, A only
(4). A, B, C only
A. Detrivores perform fragmentation.
B. The humus is further degraded by some microbes during mineralization.
C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
D. The detritus food chain begins with living organisms.
E. Earthworms break down detritus into smaller particles by a process called catabolism.
Choose the correct answer from the option given below :
(1). B,C, D only
(2). C, D, E only
(3). D, E, A only
(4). A, B, C only
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
In the equation
GPP-R= NPP
GPP is Gross Primary Productivity
NPP is Net Primary Productivity
R here is
(1). Respiratory quotient
(2). Respiratory loss
(3). Reproductive allocation
(4). Photosynthetically active radiation
GPP-R= NPP
GPP is Gross Primary Productivity
NPP is Net Primary Productivity
R here is
(1). Respiratory quotient
(2). Respiratory loss
(3). Reproductive allocation
(4). Photosynthetically active radiation
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Given below are two statements:
Statement I : Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually.
Statement II : In general, carnivores are more adversely affected by competition than herbivores.
In the light of the above statements, choose the correct answer from the options given below:
(1). Both Statement I and Statement II are false
(2). Statement I is correct but Statement II is false
(3). Statement I is incorrect but Statement II is true
(4). Both Statement I and Statement II are true.
Statement I : Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually.
Statement II : In general, carnivores are more adversely affected by competition than herbivores.
In the light of the above statements, choose the correct answer from the options given below:
(1). Both Statement I and Statement II are false
(2). Statement I is correct but Statement II is false
(3). Statement I is incorrect but Statement II is true
(4). Both Statement I and Statement II are true.
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Match List I with List II:
Choose the correct answer from the options given below:
(1). A-IV, B-I, C-II, D-III
(2). A-IV, B-III, C-I, D-II
(3). A-III, B-I, C-IV, D-II
(4). A-IV, B-II, C-I, D-III
Choose the correct answer from the options given below:
(1). A-IV, B-I, C-II, D-III
(2). A-IV, B-III, C-I, D-II
(3). A-III, B-I, C-IV, D-II
(4). A-IV, B-II, C-I, D-III
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Match List I with List II.
Choose the correct answer from the options given below:
(1). A-I, B-II, C-IV, D-III
(2). A-III, B-IV, C-I, D-II
(3). A-II, B-III, C-I, D-IV
(4). A-I, B-II, C-III, D-IV
Choose the correct answer from the options given below:
(1). A-I, B-II, C-IV, D-III
(2). A-III, B-IV, C-I, D-II
(3). A-II, B-III, C-I, D-IV
(4). A-I, B-II, C-III, D-IV
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Detritivores breakdown detritus into smaller
particles. This process is called:
(1). Catabolism
(2). Fragmentation
(3). Humification
(4). Decomposition
(1). Catabolism
(2). Fragmentation
(3). Humification
(4). Decomposition
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Given below are two statements:
Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes.
Statement II: Decomposition is faster if the detritus is rich in lignin and chitin.
In the light of the above statements, choose the correct answer from the options given below
(1). Both Statement I and Statement II are correct
(2). Both Statement I and Statement II are incorrect
(3). Statement I is correct but Statement II is incorrect
(4). Statement I is incorrect but Statement II is correct
Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes.
Statement II: Decomposition is faster if the detritus is rich in lignin and chitin.
In the light of the above statements, choose the correct answer from the options given below
(1). Both Statement I and Statement II are correct
(2). Both Statement I and Statement II are incorrect
(3). Statement I is correct but Statement II is incorrect
(4). Statement I is incorrect but Statement II is correct
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Match List-I with List-II.
Choose the correct answer from the options given below.
(1). (a) - (iv), (b) - (ii), (c) - (iii), (d) - (i)
(2). (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)
(3). (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
(4). (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
Choose the correct answer from the options given below.
(1). (a) - (iv), (b) - (ii), (c) - (iii), (d) - (i)
(2). (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)
(3). (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
(4). (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:
(1). Climax
(2). Climax community
(3). Standing state
(4). Standing crop
(1). Climax
(2). Climax community
(3). Standing state
(4). Standing crop
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
In the equation GPP-R= NPP R represents:
(1). Radiant energy
(2). Retardation factor
(3). Environment factor
(4). Respiration losses
(1). Radiant energy
(2). Retardation factor
(3). Environment factor
(4). Respiration losses
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Which of the following statements is not correct?
(1). Pyramid of biomass in sea is generally inverted.
(2). Pyramid of biomass in sea is generally upright.
(3). Pyramid of energy is always upright.
(4). Pyramid of numbers in a grassland ecosystem is upright.
(1). Pyramid of biomass in sea is generally inverted.
(2). Pyramid of biomass in sea is generally upright.
(3). Pyramid of energy is always upright.
(4). Pyramid of numbers in a grassland ecosystem is upright.
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Match the trophic levels with their correct speciesexamples in grassland ecosystem.
Select the correct option:
(1). (a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
(2). (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
(3). (a) - ( i), (b) - (ii), (c) - (iii), (d) - (iv)
(4). (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)
Select the correct option:
(1). (a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
(2). (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
(3). (a) - ( i), (b) - (ii), (c) - (iii), (d) - (iv)
(4). (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
In relation to Gross primary productivity and Net
primary productivity of an ecosystem, which one of
the following statements is correct?
(1). Gross primary productivity is always more than net primary productivity.
(2). Gross primary productivity and Net primary productivity are one and same.
(3). There is no relationship between Gross primary productivity and Net primary productivity.
(4). Gross primary productivity is always less than net primary productivity.
(1). Gross primary productivity is always more than net primary productivity.
(2). Gross primary productivity and Net primary productivity are one and same.
(3). There is no relationship between Gross primary productivity and Net primary productivity.
(4). Gross primary productivity is always less than net primary productivity.
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Thiobacillusis a group of bacteria helpful in carrying out
(1). chemoautotrophic fixation.
(2). nitrification.
(3). denitrification.
(4). nitrogen fixation.
(1). chemoautotrophic fixation.
(2). nitrification.
(3). denitrification.
(4). nitrogen fixation.
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Which of the following ecological pyramids is generally inverted ?
(1). Pyramid of energy
(2). Pyramid of biomass in a forest
(3). Pyramid of biomass in a sea
(4). Pyramid of numbers in grassland
(1). Pyramid of energy
(2). Pyramid of biomass in a forest
(3). Pyramid of biomass in a sea
(4). Pyramid of numbers in grassland
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
What type of ecological pyramid would be obtained with the following data ?
Secondary consumer : 120 g
Primary consumer : 60 g Primary producer : 10 g
(1). Upright pyramid of biomass
(2). Upright pyramid of numbers
(3). Pyramid of energy
(4). Inverted pyramid of biomass
Secondary consumer : 120 g
Primary consumer : 60 g Primary producer : 10 g
(1). Upright pyramid of biomass
(2). Upright pyramid of numbers
(3). Pyramid of energy
(4). Inverted pyramid of biomass
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Mycorrhizae are the example of
(1). mutualism.
(2). fungistasis.
(3). amensalism.
(4). antibiosis.
(1). mutualism.
(2). fungistasis.
(3). amensalism.
(4). antibiosis.
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Which ecosystem has the maximum biomass ?
(1). Lake ecosystem
(2). Forest ecosystem
(3). Grassland ecosystem
(4). Pond ecosystem
(1). Lake ecosystem
(2). Forest ecosystem
(3). Grassland ecosystem
(4). Pond ecosystem
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Alexander Von Humboldt described for the first time
(1). population Growth equation.
(2). ecological Biodiversity.
(3). laws of limiting factor.
(4). species area relationships.
(1). population Growth equation.
(2). ecological Biodiversity.
(3). laws of limiting factor.
(4). species area relationships.
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Which one of the following is a characteristic feature of cropland ecosystem ?
(1). Least genetic diversity
(2). The absence of weeds
(3). Ecological succession
(4). The absence of soil organisms
(1). Least genetic diversity
(2). The absence of weeds
(3). Ecological succession
(4). The absence of soil organisms
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
Which of the following would appear as the pioneer organisms on bare rocks ?
(1). Liverworts
(2). Mosses
(3). Green algae
(4). Lichens
(1). Liverworts
(2). Mosses
(3). Green algae
(4). Lichens
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02
The term ecosystem was coined by
(1). A G Tansley
(2). E Haeckel
(3). E Warming
(4). EP Odum
(1). A G Tansley
(2). E Haeckel
(3). E Warming
(4). EP Odum
Number of Attempts: 2
Correct Attempts: 1
Time Taken: 00:04
Average Time: 00:02