Ecosystem
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Ecosystem
82 questions · Biology · NEET
- Given below are two statements: Statement I: The primary source of energy in an ecosystem is solar energy. Statement II : The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity…2025 · Q3 · MCQ
- Who is known as the father of Ecology in India?2025 · Q33 · MCQ
- Given below are two 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…2025 · Q63 · MCQ
- Which of the following is the unit of productivity of an Ecosystem?2025 · Q64 · MCQ
- In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is , what would be the GPP (Gross Primary Productivity) of the third trophic level of the…2024 · Q43 · MCQ
- Consider the pyramid of energy of an ecosystem given below: If T is equivalent to , what is the value at ? Includes diagram2024 · Q40 · MCQ
- Which one of the following is not a limitation of ecological pyramids?2024 · Q43 · MCQ
- The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as :2023 · Q17 · MCQ
- The species of plants that plays a vital role in controlling the relative abundance of other species in a community is called _________.2023 · Q19 · MCQ
- Match List - I with List - II Choose the correct answer from the options given below : Includes table2023 · Q2 · MCQ
- In the equation GPP R = NPP GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is __________.2023 · Q17 · MCQ
- Which one of the following statements is NOT correct?2023 · Q36 · MCQ
- Match List I with List II: Choose the correct answer from the options given below: Includes table2023 · Q37 · MCQ
- 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…2023 · Q5 · MCQ
- The pioneer species in a hydrarch succession are2022 · Q22 · MCQ
- The species that come to appear in bare area are called2022 · Q24 · MCQ
- The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called2022 · Q57 · MCQ
- 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 same garden by :2022 · Q70 · MCQ
- All successions irrespective of the habitat proceed to which type of climax community?2022 · Q8 · MCQ
- 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…2022 · Q3 · MCQ
- Which one of the following will accelerate phosphorus cycle?2022 · Q38 · MCQ
- Detritivores breakdown detritus into smaller particles. This process is called :2022 · Q74 · MCQ
- The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as :2021 · Q14 · MCQ
- Which of the following statements is not correct?2021 · Q18 · MCQ
- In the equation GPP - R = NPP R represents :2021 · Q24 · MCQ
- In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?2020 · Q70 · MCQ
- Match the trophic levels with their correct species examples in grassland ecosystem. (A) Fourth trophic level (i) Crow (B) Second trophic level (ii) Vulture (C) First trophic level (iii) Rabbit (D) Third trophic level (iv) Grass Select the…2020 · Q71 · MCQ
- Which of the following is the most important cause for animals and plants being driven to extinction?2019 · Q43 · MCQ
- Which of the following ecological pyramids is generally inverted?2019 · Q55 · MCQ
- What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g2018 · Q59 · MCQ
- Which ecosystem has the maximum biomass ?2017 · Q51 · MCQ
- Which of the following would appear as the pioneer organisms on bare rocks?2016 · Q52 · MCQ
- Which one of the following is a characteristic feature of cropland ecosystem ?2016 · Q53 · MCQ
- The term ecosystem was coined by :2016 · Q54 · MCQ
- The primary producers of the deep-sea hydrothermal vent ecosystem are2016 · Q48 · MCQ
- Most animals that live in deep oceanic waters are -2015 · Q38 · MCQ
- During ecological succession :2015 · Q39 · MCQ
- In which of the following both pairs have correct combination?2015 · Q40 · MCQ
- Secondary Succession takes place on/in :2015 · Q70 · MCQ
- Vertical distribution of different species occupying different levels in a biotic community is known as :2015 · Q71 · MCQ
- The mass of living material at a trophic level at a particular time is called :2015 · Q72 · MCQ
- Most animals are tree dwellers in a:2015 · Q73 · MCQ
- In an ecosystem the rate of production of organic matter during photosynthesis is termed as :2015 · Q74 · MCQ
- Match the following and select the correct option: Includes table2014 · Q45 · MCQ
- Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks. Includes diagram2014 · Q46 · MCQ
- 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 → snake → peacock2014 · Q47 · MCQ
- When man eats fish which feeds on zooplankton which have eaten small plants, the producer in the chain is :2013 · Q42 · MCQ
- Which one of the following is a primary consumer in maize field ecosystem ?2013 · Q50 · MCQ
- Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere ?2013 · Q81 · MCQ
- Natural reservoir of phosphorus is :2013 · Q44 · MCQ
- Which one of the following processes during decomposition is correctly described ?2013 · Q45 · MCQ
- Secondary productivity is rate of formation of new organic matter by :2013 · Q46 · MCQ
- The second stage of hydrosere is occupied by plants like2012 · Q27 · MCQ
- The rate of formation of new organic matter by rabbit in a grassland, is called :2012 · Q43 · MCQ
- Identify the likely organisms (a), (b), (c) and (d) in the food web shown below : Includes diagram2012 · Q44 · MCQ
- Giiven below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels ? Includes diagram2012 · Q49 · MCQ
- Which one of the following is not a functional unit of an ecosystem?2012 · Q50 · MCQ
- Which one of the following is not a gaseous biogeochemical cycle in ecosystem ?2012 · Q51 · MCQ
- Identify the possible link "A" in the following food chain : Plant → insect → frog →"A"→ Eagle2012 · Q52 · MCQ
- The upright pyramid of number is absent in2012 · Q53 · MCQ
- The breakdown of detritus into smaller particles by earthworm is a process called2011 · Q41 · MCQ
- Both, hydrarch and xerarch successions lead to :2011 · Q42 · MCQ
- Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time ?2011 · Q43 · MCQ
- Which one of the following statements is correct for secondary succession?2011 · Q45 · MCQ
- Of the total incident solar radiation the proportion of PAR is2011 · Q46 · MCQ
- Mass of living matter at a trophic level in an area at any time is called :2011 · Q47 · MCQ
- Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?2011 · Q48 · MCQ
- Which of the following representations shows the pyramid of numbers in a forest ecosystem ? Includes diagram2010 · Q36 · MCQ
- The biomass available for consumption by the herbivores and the decomposers is called –2010 · Q57 · MCQ
- The correct sequence of plants in hydrosere is :2009 · Q48 · MCQ
- Which one of the following types organisms occupy more than one trophic level in a pond ecosystem ?2009 · Q49 · MCQ
- About 70% of total global carbon is found in:2008 · Q48 · MCQ
- Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of deers (iii)…2008 · Q49 · MCQ
- The slow rate of decomposition of fallen logs in nature is due to their:2008 · Q50 · MCQ
- Which one of the following ecosystem types has the highest annual net primary productivity ?2007 · Q38 · MCQ
- Which one of the following is not used for construction of ecological pyramids ?2006 · Q49 · MCQ
- Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem ?2004 · Q37 · MCQ
- An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having -2004 · Q50 · MCQ
- Which of the following plants are used as green manure in crop fields and in sandy soils ?2003 · Q46 · MCQ
- Bamboo plant is growing in a far forest then what will be the trophic level of it ?2002 · Q54 · MCQ
- Plant Decomposers are : -2001 · Q50 · MCQ
- Which is the reason for highest biomass in aquatic ecosystem ?2000 · Q47 · MCQ