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Ecosystem · Question 10

RE-NEET (UG) 2024MCQEasy📈 Topic in 38% papers+4−1
1

Consider the pyramid of energy of an ecosystem given below: [figure] If T4 is equivalent to 1000 J, what is the value at T1 ?

  1. 1000010 J
  2. 1000010 4 J
  3. 10,000 J
  4. 10,00,000 J

Answer

(4) 10,00,000 J

Solution

By Lindeman's 10 percent law, only 10% of the energy of one trophic level passes to the next.

Energy at a level = 10 energy at the level above it

T3 = 10 1000 = 10,000 J

T2 = 10 10,000 = 1,00,000 J

T1 = 10 1,00,000 = 10,00,000 J

Answer: (4)

RE-NEET (UG) 2024

Keep practising — Ecosystem

2

Which one of the following is not a limitation of ecological pyramids?

  1. Saprophytes are not given any place in ecological pyramids
  2. It assumes a simple food chain, that almost never exists in nature
  3. It accommodates a food web
  4. It does not take into account the same species belonging to two or more trophic levels
RE-NEET (UG) 2024
3

Identify the correct statements : Choose the correct answer from the options given below :

  1. B, C, D only
  2. C, D, E only
  3. D, E, A only
  4. A, B, C only
NEET (UG) 2023
4

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
NEET (UG) 2023
5

Given below are two statements: 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
NEET (UG) 2022
6

Which one of the following will accelerate phosphorus cycle?

  1. Burning of fossil fuels
  2. Volcanic activity
  3. Weathering of rocks
  4. Rainfall and storms
NEET (UG) 2022
7

Detritivores breakdown detritus into smaller particles. This process is called :

  1. Catabolism
  2. Fragmentation
  3. Humification
  4. Decomposition
NEET (UG) 2022
8

All successions irrespective of the habitat proceed to which type of climax community?

  1. Edaphic
  2. Xeric
  3. Mesic
  4. Hydrophytic
NEET (UG) 2022 (Phase 2)
9

The pioneer species in a hydrarch succession are

  1. Filamentous algae
  2. Free-floating angiosperms
  3. Submerged rooted plants
  4. Phytoplanktons
NEET (UG) 2022 (Phase 2)
10

The species that come to appear in bare area are called

  1. Species of seral community
  2. Pioneer species
  3. Invasive species
  4. Competitive species
NEET (UG) 2022 (Phase 2)
11

Match List - I with List - II : Choose the correct answer from the options given below:

  1. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
  2. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  3. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  4. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
NEET (UG) 2022 (Phase 2)

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
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