The term ecosystem was coined by:
1. A.G. Tansley 2. E. Haeckel
3. E. warming 4. E.P. Odum

Subtopic:  Introduction |
 85%
NEET - 2016
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In which of the following, do both pairs have the correct combination?

1. Gaseous nutrient cycle
Sedimentary nutrient cycle
Carbon and nitrogen
Sulphur and phosphorous
2. Gaseous nutrient cycle
Sedimentary nutrient cycle
Carbon and sulphur
Nitrogen and phosphorus
3. Gaseous nutrient cycle
Sedimentary nutrient cycle 
Nitrogen and sulphur
Carbon and phosphorous
4. Gaseous nutrient cycle
Sedimentary nutrient cycle
Sulphur and phosphorous
Carbon and nitrogen
Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 91%
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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Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks. 

A B C D
1. Rock minerals Detritus Litter fall Producers
2. Litter Producers Rock minerals Detritus
3. Detritus Rock minerals Producers Litter fall
4 Producers Litter fall Rock minerals Detritus
Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 85%
From NCERT
AIPMT - 2014
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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 |
 76%
From NCERT
AIPMT - 2014
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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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Which one of the following statements is correct for secondary succession?

1. It occurs on a deforested site
2. It follows primary succession
3. It is similar to primary succession except that it has a relatively slow pace
4. All of the above

Subtopic:  Ecological Succession (OLD NCERT) |
 65%
From NCERT
AIPMT - 2011
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Large woody vines are more commonly found in:

1.  mangroves

2.  tropical rainforests

3.  alpine forests

4.  temperate forests

Subtopic:  Components & Types of Ecosystems |
 70%
AIPMT - 2011
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Quercus species are the dominant component in:

1. temperate deciduous forests
2. alpine forests
3. scrub forests
4. tropical rain forests
Subtopic:  Components & Types of Ecosystems |
 51%
AIPMT - 2008
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