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Ecosystem · Question 22

NEET (UG) 2021MCQEasy📈 Topic in 25% papers+4−1
1

The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred to as :

  1. Standing crop
  2. Climax
  3. Climax community
  4. Standing state

Answer

(4) Standing state

Solution

As per NCERT, the amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc., present in the soil at any given time, is referred to as the standing state.

It varies in different kinds of ecosystems and also on a seasonal basis. (Standing crop is the mass of living material at each trophic level.)

Answer: (4)

NEET (UG) 2021

Keep practising — Ecosystem

2

Which of the following statements is not correct?

  1. Pyramid of numbers in a grassland ecosystem is upright
  2. Pyramid of biomass in sea is generally inverted.
  3. Pyramid of biomass in sea is generally upright.
  4. Pyramid of energy is always upright.
NEET (UG) 2021
3

In the equation GPP - R = NPP R represents :

  1. Respiration losses
  2. Radiant energy
  3. Retardation factor
  4. Environmental factor
NEET (UG) 2021
4

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

  1. There is no relationship between Gross primary productivity and Net primary productivity
  2. Gross primary productivity is always more than net primary productivity
  3. Gross primary productivity is always less than net primary productivity
  4. Gross primary productivity and Net primary productivity are one and same
NEET (UG) 2020
5

Match the trophic levels with their correct species examples in grassland ecosystem. Select the correct option

  1. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
  2. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
  3. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
  4. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
NEET (UG) 2020
6

Which of the following ecological pyramids is generally inverted?

  1. Pyramid of biomass in a forest
  2. Pyramid of biomass in a sea
  3. Pyramid of numbers in grassland
  4. Pyramid of energy
NEET (UG) 2019
7

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

  1. Inverted pyramid of biomass
  2. Pyramid of energy
  3. Upright pyramid of numbers
  4. Upright pyramid of biomass
NEET 2018
8

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

  1. Grassland
  2. Tropical Savannah
  3. Temperate Forest
  4. Tropical Rain Forest
NEET 2017
9

Which ecosystem has the maximum biomass ?

  1. Pond ecosystem
  2. Lake ecosystem
  3. Grassland ecosystem
  4. Forest ecosystem
NEET 2017
10

Which of the following would appear as the pioneer organisms on bare rocks?

  1. Lichens
  2. Green algae
  3. Liverworts
  4. Mosses
NEET 2016 (Phase 1)
11

Which one of the following is a characteristic feature of cropland ecosystem ?

  1. Absence of weeds
  2. Absence of soil organisms
  3. Ecological succession
  4. Least genetic diversity
NEET 2016 (Phase 1)

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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)