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Ecosystem · Question 41

AIPMT 2015 (Cancelled)MCQEasy📈 Topic in 12% papers+4−1
1

Secondary Succession takes place on/in :

  1. Newly created pond
  2. Newly cooled lava
  3. Bare rock
  4. Degraded forest

Answer

(4) Degraded forest

Solution

As per NCERT, primary succession begins in areas where no living organisms ever existed, e.g., newly cooled lava, bare rock, newly created pond or reservoir.

⇒ Secondary succession begins in areas where natural biotic communities have been destroyed, such as abandoned farm lands, burned or cut forests and lands that have been flooded.

∵ Soil (sediment) is already present there, secondary succession is faster than primary succession.

∴ Secondary succession takes place in a degraded forest.

Answer: (4)

AIPMT 2015 (Cancelled)

Keep practising — Ecosystem

2

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)
3

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
4

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
5

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
6

Natural reservoir of phosphorus is :

  1. Fossils
  2. Rock
  3. Sea water
  4. Animal bones
NEET 2013
7

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

  1. Parasite
  2. Decomposer
  3. Producer
  4. Consumers
NEET 2013
8

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
9

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

  1. Phytoplankton
  2. Lion
  3. Grasshopper
  4. Wolf
NEET 2013 (Karnataka)
10

When man eats fish which feeds on zooplankton which have eaten small plants, the producer in the chain is :

  1. Zooplankton
  2. Fish
  3. Small plants
  4. Man
NEET 2013 (Karnataka)
11

The rate of formation of new organic matter by rabbit in a grassland, is called :

  1. Net productivity
  2. Gross primary productivity
  3. Secondary productivity
  4. Net primary productivity
AIPMT 2012 (Mains)

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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)