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Ecosystem · Question 75

AIPMT 2006MCQEasy📈 Topic in 38% papers+4−1
1

Which one of the following is not used for construction of ecological pyramids ?

  1. Rate of energy flow
  2. Dry weight
  3. Fresh weight
  4. Number of individuals

Answer

(3) Fresh weight

Solution

As per NCERT, ecological pyramids are of three types: pyramid of number, pyramid of biomass and pyramid of energy.

⇒ Pyramid of number → number of individuals.

⇒ Pyramid of biomass → dry weight (fresh weight is not used, because water content varies widely among organisms).

⇒ Pyramid of energy → rate of energy flow at each trophic level.

∴ Fresh weight is not used.

Answer: (3)

AIPMT 2006

Keep practising — Ecosystem

2

Which of the following is expected to have the highest value (g/m2/yr) in a grassland ecosystem ?

  1. Net production (NP)
  2. Secondary production
  3. Tertiary production
  4. Gross production (GP)
AIPMT 2004
3

Bamboo plant is growing in a far forest then what will be the trophic level of it ?

  1. Second trophic level (T2)
  2. First trophic level (T1)
  3. Fourth trophic level (T4)
  4. Third trophic level (T3)
AIPMT 2002
4

Plant decomposers are:

  1. Protista and Animalia
  2. Animalia and Monera
  3. Monera and fungi
  4. Fungi and plants
AIPMT 2001
5

Which is the reason for highest biomass in aquatic ecosystem?

  1. Benthonic and brown algae
  2. Nanoplankton, blue green algae, green algae
  3. Diatoms
  4. Sea grass and slime moulds
AIPMT 2000

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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
Other chaptersBiomolecules (Biology)