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Ecosystem · Question 39

AIPMT 2015 (Cancelled)MCQEasy📈 Topic in 38% papers+4−1
1

The mass of living material at a trophic level at a particular time is called :

  1. Net primary productivity
  2. Standing state
  3. Standing crop
  4. Gross primary productivity

Answer

(3) Standing crop

Solution

As per NCERT, each trophic level has a certain mass of living material at a particular time called the standing crop.

⇒ It is measured as the biomass of living organisms or the number in a unit area.

(Standing state is the amount of nutrients present in the soil at a given time.)

∴ The answer is standing crop.

Answer: (3)

AIPMT 2015 (Cancelled)

Keep practising — Ecosystem

2

Vertical distribution of different species occupying different levels in a biotic community is known as :

  1. Stratification
  2. Pyramid
  3. Divergence
  4. Zonation
AIPMT 2015 (Cancelled)
3

Secondary Succession takes place on/in :

  1. Newly created pond
  2. Newly cooled lava
  3. Bare rock
  4. Degraded forest
AIPMT 2015 (Cancelled)
4

In an ecosystem the rate of production of organic matter during photosynthesis is termed as :

  1. Secondary productivity
  2. Net Productivity
  3. Net primary productivity
  4. Gross primary productivity
AIPMT 2015 (Cancelled)
5

Match the following and select the correct option:

  1. (a) (i), (b) (ii), (c) (iii), (d) (iv)
  2. (a) (iii), (b) (ii), (c) (iv), (d) (i)
  3. (a) (iv), (b) (i), (c) (iii), (d) (ii)
  4. (a) (ii), (b) (i), (c) (iv), (d) (iii)
AIPMT 2014
6

Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks. [figure]

  1. A Detritus, B Rock minerals, C Producer, D Litter fall
  2. A Litter fall, B Producers, C Rock minerals, D Detritus
  3. A Rock minerals, B Detritus, C Litter fall, D Producers
  4. A Producers, B Litter fall, C Rock minerals, D Detritus
AIPMT 2014
7

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 peacock

  1. 0.0002 J
  2. 0.002 J
  3. 0.2 J
  4. 0.02 J
AIPMT 2014
8

Natural reservoir of phosphorus is :

  1. Fossils
  2. Rock
  3. Sea water
  4. Animal bones
NEET 2013
9

Secondary productivity is rate of formation of new organic matter by :

  1. Parasite
  2. Decomposer
  3. Producer
  4. Consumers
NEET 2013
10

Which one of the following processes during decomposition is correctly described ?

  1. Catabolism – Last step in the decomposition under fully anaerobic condition
  2. Leaching – Water soluble inorganic nutrients rise to the top layers of soil
  3. Fragmentation – Carried out by organisms such as earthworm
  4. Humification – Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate
NEET 2013
11

Which one of the following is a primary consumer in maize field ecosystem ?

  1. Phytoplankton
  2. Lion
  3. Grasshopper
  4. Wolf
NEET 2013 (Karnataka)

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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)