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MCQ (Single Correct Answer)

NEET 2023 Manipur
Match List - I with List - II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-fa...
NEET 2023 Manipur
The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as :
NEET 2023 Manipur
The species of plants that plays a vital role in controlling the relative abundance of other species in a community is called _________.
NEET 2023
Identify the correct statements : A. Detrivores perform fragmentation. B. The humus is further degraded by some microbes during mineralization. C. Wat...
NEET 2023
In the equation GPP $$-$$ R = NPP GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is __________.
NEET 2023
Which one of the following statements is NOT correct?
NEET 2023
Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
NEET 2022 Phase 2
All successions irrespective of the habitat proceed to which type of climax community?
NEET 2022 Phase 2
The pioneer species in a hydrarch succession are
NEET 2022 Phase 2
The species that come to appear in bare area are called
NEET 2022 Phase 2
The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called
NEET 2022 Phase 2
Two butterfly species are competing for the same nectar of a flower in a garden. To survive and coexist together, they may avoid competition in the sa...
NEET 2022 Phase 1
Given below are two statements: Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statem...
NEET 2022 Phase 1
Which one of the following will accelerate phosphorus cycle?
NEET 2022 Phase 1
Detritivores breakdown detritus into smaller particles. This process is called :
NEET 2021
The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as :
NEET 2021
Which of the following statements is not correct?
NEET 2021
In the equation GPP - R = NPPR represents :
NEET 2020 Phase 1
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
NEET 2020 Phase 1
Match the trophic levels with their correct species examples in grassland ecosystem. (A) Fourth trophic level   (i) Crow (B) Second tro...
NEET 2019
Which of the following is the most important cause for animals and plants being driven to extinction?
NEET 2019
Which of the following ecological pyramids is generally inverted?
NEET 2018
What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g...
NEET 2017
Which ecosystem has the maximum biomass ?
NEET 2016 Phase 2
The primary producers of the deep-sea hydrothermal vent ecosystem are
NEET 2016 Phase 1
Which of the following would appear as the pioneer organisms on bare rocks?
NEET 2016 Phase 1
Which one of the following is a characteristic feature of cropland ecosystem ?
NEET 2016 Phase 1
The term ecosystem was coined by :
AIPMT 2015
Most animals that live in deep oceanic waters are -
AIPMT 2015
During ecological succession :
AIPMT 2015
In which of the following both pairs have correct combination?
AIPMT 2015 Cancelled Paper
Vertical distribution of different species occupying different levels in a biotic community is known as :
AIPMT 2015 Cancelled Paper
Secondary Succession takes place on/in :
AIPMT 2015 Cancelled Paper
The mass of living material at a trophic level at a particular time is called :
AIPMT 2015 Cancelled Paper
Most animals are tree dwellers in a:
AIPMT 2015 Cancelled Paper
In an ecosystem the rate of production of organic matter during photosynthesis is termed as :
AIPMT 2014
Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks. ...
AIPMT 2014
Match the following and select the correct option: .tg {border-collapse:collapse;border-spacing:0;width: 100%} .tg td{font-family:Arial, sans-serif...
AIPMT 2014
If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? Plant → mice → snak...
NEET 2013 (Karnataka)
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere ?
NEET 2013 (Karnataka)
Which one of the following is a primary consumer in maize field ecosystem ?
NEET 2013 (Karnataka)
When man eats fish which feeds on zooplankton which have eaten small plants, the producer in the chain is :
NEET 2013
Natural reservoir of phosphorus is :
NEET 2013
Which one of the following processes during decomposition is correctly described ?
NEET 2013
Secondary productivity is rate of formation of new organic matter by :
AIPMT 2012 Mains
Identify the likely organisms (a), (b), (c) and (d) in the food web shown below : ...
AIPMT 2012 Mains
The rate of formation of new organic matter by rabbit in a grassland, is called :
AIPMT 2012 Mains
The second stage of hydrosere is occupied by plants like
AIPMT 2012 Prelims
Giiven below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels ? ...
AIPMT 2012 Prelims
Which one of the following is not a functional unit of an ecosystem?
AIPMT 2012 Prelims
Which one of the following is not a gaseous biogeochemical cycle in ecosystem ?
AIPMT 2012 Prelims
Identify the possible link "A" in the following food chain : Plant → insect → frog →"A"→ Eagle
AIPMT 2012 Prelims
The upright pyramid of number is absent in
AIPMT 2011 Mains
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time ?
AIPMT 2011 Mains
Both, hydrarch and xerarch successions lead to :
AIPMT 2011 Mains
The breakdown of detritus into smaller particles by earthworm is a process called
AIPMT 2011 Prelims
Mass of living matter at a trophic level in an area at any time is called :
AIPMT 2011 Prelims
Of the total incident solar radiation the proportion of PAR is
AIPMT 2011 Prelims
Which one of the following statements is correct for secondary succession?
AIPMT 2011 Prelims
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
AIPMT 2010 Mains
Which of the following representations shows the pyramid of numbers in a forest ecosystem ? ...
AIPMT 2010 Prelims
The biomass available for consumption by the herbivores and the decomposers is called –
AIPMT 2009
The correct sequence of plants in hydrosere is :
AIPMT 2009
Which one of the following types organisms occupy more than one trophic level in a pond ecosystem ?
AIPMT 2008
The slow rate of decomposition of fallen logs in nature is due to their:
AIPMT 2008
About 70% of total global carbon is found in:
AIPMT 2008
Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation ...
AIPMT 2007
Which one of the following ecosystem types has the highest annual net primary productivity ?
AIPMT 2006
Which one of the following is not used for construction of ecological pyramids ?
AIPMT 2004
Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem ?
AIPMT 2004
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having -
AIPMT 2003
Which of the following plants are used as green manure in crop fields and in sandy soils ?
AIPMT 2002
Bamboo plant is growing in a far forest then what will be the trophic level of it ?
AIPMT 2001
Plant Decomposers are : -
AIPMT 2000
Which is the reason for highest biomass in aquatic ecosystem ?
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