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Ecosystem · Question 74

AIPMT 2007MCQEasy📈 Topic in 50% papers+4−1
1

Which one of the following ecosystem types has the highest annual net primary productivity ?

  1. Temperate evergreen forest
  2. Temperate deciduous forest
  3. Tropical rain forest
  4. Tropical deciduous forest

Answer

(3) Tropical rain forest

Solution

As per NCERT, primary productivity depends on the plant species inhabiting a particular area and on environmental factors such as availability of nutrients and photosynthetic capacity of plants; hence it varies in different types of ecosystems.

⇒ Tropical rain forests have high temperature, high rainfall, abundant sunlight throughout the year and dense multi-layered vegetation.

∵ Photosynthesis goes on all year round, their annual net primary productivity is the highest among the given (terrestrial) ecosystems (about 2200 g m-2 yr-1).

∴ Tropical rain forest has the highest annual NPP.

Answer: (3)

AIPMT 2007

Keep practising — Ecosystem

2

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
AIPMT 2006
3

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
4

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
5

Plant decomposers are:

  1. Protista and Animalia
  2. Animalia and Monera
  3. Monera and fungi
  4. Fungi and plants
AIPMT 2001
6

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
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