Ecosystem

Bihar Board Class 12 · Biology · 22 past questions

1. Q1 2026 Set A

   Which of the following is not the primary consumer of an ecosystem?

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2. Q2 2026 Set A

   How much percentage of photo-synthetically active radiation is captured by plants?

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3. Q3 2026 Set A

   What is the raw material for decomposition called?

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4. Q4 2026 Set A

   What is secondary consumer called?

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5. Q5 2026 Set A

   What are those called which obtain energy and nutrition from breaking dead organic matter or detritus?

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6. Q6 2025

   What is the rate of production of organic matter during photosynthesis?

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7. Q7 2025

   Which of the following process is not involved in decomposition?

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8. Q8 2025

   What percentage of photosynthetically active radiation do plants capture?

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9. Q9 2025

   The detritus food chain begins with which of the following?

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10. Q10 2024 Set E

    Going down of inorganic water soluble nutrients into the soil nutrients is called as?

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11. Q11 2024 Set E

    Which of the following are decomposers?

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12. Q12 2023

    Which one is pioneer in a xerosere ?

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13. Q13 2023

    The two components of an ecosystem are –

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14. Q14 2023

    Parasitic angiosperms are -

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15. Q15 2023

    In a lake, phytoplanktons grow abundantly in –

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16. Q16 2022 Set A

    Is a lithosere

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17. Q17 2021 Set H

    Which of the following is the correct food chain ?

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18. Q18 2021 Set H

    Flow of energy in food chain of an ecosystem is

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19. Q19 2020

    Which pyramid is never inverted?

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20. Q20 2020

    How do decomposers get their nutrition?

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21. Q21 2019

    Climax community is present in which area?

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22. Q22 2017

    Flow of energy in food chain of an ecosystem is

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