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Ecosystem · Question 34

NEET 2016 (Phase 2)MCQEasy📈 Topic in 50% papers+4−1
1

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

  1. chemosynthetic bacteria
  2. coral reefs
  3. green algae
  4. blue-green algae

Answer

(1) chemosynthetic bacteria

Solution

Sunlight does not reach the deep sea, so photosynthetic organisms (green algae, blue-green algae, corals with their algal partners) cannot act as producers there.

⇒ At hydrothermal vents, chemosynthetic bacteria oxidise inorganic compounds such as H2S released by the vents and use the energy to fix CO2 into organic matter.

∴ Chemosynthetic bacteria are the primary producers of this ecosystem.

Answer: (1)

NEET 2016 (Phase 2)

Keep practising — Ecosystem

2

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
3

Most animals that live in deep oceanic waters are -

  1. primary consumers
  2. detritivores
  3. tertiary consumers
  4. secondary consumers
AIPMT 2015
4

During ecological succession :

  1. the establishment of a new biotic community is very fast in its primary phase.
  2. the numbers and types of animals remain constant.
  3. the changes lead to a community that is in near equilibrium with the environment and is called pioneer community
  4. the gradual and predictable change in species composition occurs in a given area
AIPMT 2015
5

In which of the following both pairs have correct combination?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2015
6

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
AIPMT 2015 (Cancelled)
7

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)
8

Secondary Succession takes place on/in :

  1. Newly created pond
  2. Newly cooled lava
  3. Bare rock
  4. Degraded forest
AIPMT 2015 (Cancelled)
9

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)
10

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
11

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

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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)