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Ecosystem · Question 28

NEET 2018MCQEasy📈 Topic in 38% papers+4−1
1

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

Answer

(1) Inverted pyramid of biomass

Solution

The data are given in grams, i.e. as standing crop (biomass) of each trophic level.

Producer (10 g) < primary consumer (60 g) < secondary consumer (120 g)

∵ Biomass increases from the base to the top, the pyramid has a narrow base.

As per NCERT, the pyramid of biomass in the sea is generally inverted because the biomass of fishes far exceeds that of phytoplankton.

∴ An inverted pyramid of biomass is obtained.

Answer: (1)

NEET 2018

Keep practising — Ecosystem

2

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
3

Which ecosystem has the maximum biomass ?

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

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)
5

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)
6

The term ecosystem was coined by :

  1. E.P. Odum
  2. E. Haeckel
  3. E. Warming
  4. A.G. Tansley
NEET 2016 (Phase 1)
7

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)
8

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
9

Most animals that live in deep oceanic waters are -

  1. primary consumers
  2. detritivores
  3. tertiary consumers
  4. secondary consumers
AIPMT 2015
10

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
11

In which of the following both pairs have correct combination?

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

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