The vertical distribution of different species occupying different levels in a biotic community is known as:

1. divergence
2. stratification
3. zonation
4. pyramid

Subtopic:  Components & Types of Ecosystems |
 90%
From NCERT
NEET - 2015
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The mass of living material at a tropic level at a particular time is called:

1. gross primary productivity
2. standing state
3. net primary productivity
4. standing crop

Subtopic:  Ecosystem Productivity |
 74%
From NCERT
NEET - 2015
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In an ecosystem, the rate of production of organic matter during photosynthesis is termed as:

1. net primary productivity

2. gross primary productivity

3. secondary productivity

4. net productivity

Subtopic:  Ecosystem Productivity |
 80%
From NCERT
NEET - 2015
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Most animals are tree dwellers in a:

1. coniferous forest
2. thorn woodland
3. temperate deciduous forest
4. tropical rainforest

Subtopic:  Components & Types of Ecosystems |
 68%
NEET - 2015
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If 20 J of energy is trapped at the producer level, then how much energy will be available to peacocks as food in the following chain? 
Plant → mice →snake→ peacock

1. 0.02 J 2. 0.002 J
3. 0.2 J 4. 0.0002 J
Subtopic:  Ecological Pyramids |
 77%
From NCERT
AIPMT - 2014
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Which one of the following processes during decomposition is correctly described?

1. Humanification-Leads to the accumulation of a dark-coloured substance in humans which undergoes microbial action at a very fast rate
2. Catabolism-Last step decomposition under fully anaerobic condition
3. Leaching-Water soluble inorganic nutrients rise to the top layers of the soil
4. Fragmentation-Carried out by organisms such as earthworms

Subtopic:  Decomposition |
 78%
From NCERT
AIPMT - 2013
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Secondary productivity is the rate of formation of new organic matter by:

1. Parasite

2. Consumer

3. Decomposer

4. Producer

Subtopic:  Ecosystem Productivity |
 85%
From NCERT
AIPMT - 2013
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Pheretima and its close relatives derive nourishment from:

1. Sugarcane roots

2. Decaying fallen leaves and soil organic matter

3. Soil insects

4. Small pieces of fresh fallen leaves of maize

Subtopic:  Decomposition |
 88%
From NCERT
AIPMT - 2012
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Identify the possible link A in the following food chain.
Green plantInsectFrogAEagle

1. Rabbit

2. Wolf

3. Cobra

4. Parrot

Subtopic:  Energy Flow |
 89%
AIPMT - 2012
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Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels? 

1. Level PC is insects and level SC is small insectivorous birds
2. Level PP is phytoplanktons in the sea and Whale on top-level TC
3. Level PP is pipal trees and the level SC is sheep
4. Level PC is rats and level SC is cats


 

Subtopic:  Ecological Pyramids |
 54%
AIPMT - 2012
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