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Ecosystem · Question 37

AIPMT 2015MCQEasy📈 Topic in 12% papers+4−1
1

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

Answer

(4) the gradual and predictable change in species composition occurs in a given area

Solution

As per NCERT, the gradual and fairly predictable change in the species composition of a given area is called ecological succession.

(1) is wrong: primary succession is a very slow process.

(2) is wrong: the numbers and types of animals and decomposers change during succession.

(3) is wrong: the community in near equilibrium with the environment is the climax community; the first species to invade a bare area form the pioneer community.

Answer: (4)

AIPMT 2015

Keep practising — Ecosystem

2

In which of the following both pairs have correct combination?

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

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)
4

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)
5

Secondary Succession takes place on/in :

  1. Newly created pond
  2. Newly cooled lava
  3. Bare rock
  4. Degraded forest
AIPMT 2015 (Cancelled)
6

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)
7

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
8

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
9

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

  1. 0.0002 J
  2. 0.002 J
  3. 0.2 J
  4. 0.02 J
AIPMT 2014
10

Natural reservoir of phosphorus is :

  1. Fossils
  2. Rock
  3. Sea water
  4. Animal bones
NEET 2013
11

Secondary productivity is rate of formation of new organic matter by :

  1. Parasite
  2. Decomposer
  3. Producer
  4. Consumers
NEET 2013

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All NEET Botany chapters
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