PYQSide ExamsMy practice

Ecosystem · Question 25

NEET (UG) 2020MCQEasy📈 Topic in 50% papers+4−1
1

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

Answer

(2) Gross primary productivity is always more than net primary productivity

Solution

As per NCERT, a considerable amount of GPP is used by plants in respiration.

NPP = GPP - R

∵ Respiration loss R > 0 ⇒ GPP > NPP

∴ Gross primary productivity is always more than net primary productivity.

Answer: (2)

NEET (UG) 2020

Keep practising — Ecosystem

2

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
3

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
4

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
5

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
6

Which ecosystem has the maximum biomass ?

  1. Pond ecosystem
  2. Lake ecosystem
  3. Grassland ecosystem
  4. Forest ecosystem
NEET 2017
7

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)
8

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)
9

The term ecosystem was coined by :

  1. E.P. Odum
  2. E. Haeckel
  3. E. Warming
  4. A.G. Tansley
NEET 2016 (Phase 1)
10

The primary producers of the deep-sea hydrothermal vent ecosystem are

  1. chemosynthetic bacteria
  2. coral reefs
  3. green algae
  4. blue-green algae
NEET 2016 (Phase 2)
11

An association of individuals of different species living in the same habitat and having functional interactions is -

  1. Ecological niche
  2. Ecosystem
  3. Population
  4. Biotic community
AIPMT 2015

All Ecosystem PYQs →

PDFDownload Ecosystem PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
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)