Quercus species are the dominant component in

1. temperate deciduous forests

2. alpine forests

3. scrub forests

4. tropical rain forests

NEET - 2008
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Which of the following ecosystem types has the highest annual net primary productivity ?

1. Tropical rain forest

2. Tropical deciduous forest

3. Temperate evergeen forest

4. Temperate deciduous forest

Subtopic:  Ecosystem Productivity |
 83%
NEET - 2007
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Which one of the following is not used for construction of ecological pyramids?

1. Dry weight

2. Number of individuals

3. Rate of energy flow

4. Fresh weight

Subtopic:  Ecological Pyramids |
 80%
From NCERT
NEET - 2006
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In a lake that undergoes thermal stratification, blooms of phytoplankton tend to occur

1. before thermal stratification 

2. after thermal stratification 

3. at the onset of thermal stratification 

4. at the mid-phase of thermal stratification 

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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Photosynthesis is absent in 

1. aphotic layer                 

2. photic layer        

3. benthic layer                 

4. pelagic layer.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 70%
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The given type of ecological pyramid represents

 

1. pyramid of numbers in tree ecosystem

2. pyramid of biomass in a fallow land 

3. pyramid of biomass in a lake

4. energy pyramid in a spring

Subtopic:  Ecological Pyramids |
 64%
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Which of the following zones of a lake is habitat for snails, slugs and microorganisms?

1. Littoral

2. Limnetic

3. Benthic

4. Profundal

Subtopic:  Components & Types of Ecosystems |
 57%
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Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered

as occupying

1. first trophic level

2. second trophic level

3. third trophic level

4. fourth trophic level.

Subtopic:  Energy Flow |
 53%
AIIMS - 2003
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Given below is one of the types of ecological pyramids

 

This type represents

(1) pyramid of numbers in a forest

(2) pyramid of biomass in a fallow land

(3) pyramid of biomass in a lake

(4) energy pyramid in a spring.

Subtopic:  Ecological Pyramids |
 74%
AIIMS - 2005
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In India, we find mangoes with different flavours, colours, fibre content, sugar content and even shelf-life. The large variation is on account of  

(1)  species diversity    

(2)  induced mutations    

(3)  genetic diversity    

(4)  hybridisation.

Subtopic:  Introduction & Types |
 72%
From NCERT
AIIMS - 2006
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Links
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