NEET Biology - New - Ecosystem

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Question - 1

Presence of plants arranged into well defined vertical layers depending on their height can be seen be in :

  • A Tropical Savannah
  • B Tropical rain Forest
  • C Grassland
  • D Temperate Forest

Question - 2

The breakdown of detritus into small particles by earthworm is a process called :

  • A Mineralization
  • B Catabolism
  • C Humification
  • D Fragmentation

Question - 3

The biomass available for consumption by herbivores and decomposers is called :

  • A Secondary productivity
  • B Standing crop
  • C Gross primary productivity
  • D Net primary productivity

Question - 4

The slow rate of decomposition fallen logs is due to :

  • A Poor nitrogen content
  • B Anaerobic environment
  • C Low cellulose content
  • D Low moisture content

Question - 5

The highest net annual productivity occurs in :

  • A Tropical rain forests
  • B Tropical deciduous forests
  • C Temperate evergreen forests
  • D Temperate deciduous forests

Question - 6

What type of ecological pyramid would be obtained with the following data? Secondary consumer: 120g, Primary consumer: 60g Primary producer: 10 g.

  • A Upright pyramid of numbers
  • B Pyramid of energy
  • C Inverted pyramid of biomass
  • D Upright pyramid of biomass

Question - 7

Which ecosystem has the maximum biomass?

  • A Forest ecosystem
  • B Grassland ecosystem
  • C Pond ecosystem
  • D Lake ecosystem

Question - 8

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

  • A 0·02J
  • B 0·002J
  • C 0·2J
  • D 0·0002J

Question - 9

Of the total incident solar radiation the proportion of PAR is:

  • A More than 80%
  • B About 70%
  • C About 60%
  • D Less than 50%

Question - 10

The mass of living matter at a trophic level in an area at any time is called :

  • A Humus
  • B Standing state
  • C Standing crop
  • D Detritus