Geometric representation of age structure is a characteristic of:

1. Biotic community

2. Population

3. Landscape

4. Ecosystem

Subtopic:  Population Characters: Age Structure & Migration |
 79%
From NCERT
NEET - 2007
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A high density of elephant population in an area can result in:

1. Mutualism

2. Intraspecific competition

3. Interspecific competition

4. Predation on one another

Subtopic:  Population Interactions: Competition |
 70%
NEET - 2007
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Praying mantis is a good example of:

1. mullerian mimicry

2. warning colouration

3. social insects

4. camouflage

Subtopic:  Population Interactions: Predation |
 56%
NEET - 2006
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The formula for exponential population growth is :-

1. dt/dN = rN

2. dN/rN = dt

3. rN/dN = dt

4. dN/dt = rN

Subtopic:  Population: Exponential Growth Model |
 88%
From NCERT
NEET - 2006
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Annual migration does not occur in the case of:

1. Salmon

2. Siberian crane

3. Salamander

4. Arctic tern

Subtopic:  Population Characters: Age Structure & Migration |
 58%
NEET - 2006
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The population dynamics of a species is basically regulated by

1. Climate

2. Food supply

3. Competition between and within the species

4. All of the above

Subtopic:  Population Dynamic |
 93%
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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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Commensalism is an association of two species in which

1. one lives, attached to the other, without harming it

2. both organisms derive benefits from each other

3. one derives its nutrition from the other

4. none of the above

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
 84%
From NCERT
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Some students, during a study, caught, marked and released 80 fishes in a pond. Later

100 fishes were caught at random. Among these 40 were found to be marked. What is

the approximate number of fishes in the pond?

1. 50                   

2. 100

3. 200                 

4.  4000

 61%
AIIMS - 2001
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The sphere of living matter together with water, air and soil on the surface of earth is

called

1. atmosphere                       

2. hydrosphere

3. lithosphere                       

4. biosphere

Subtopic:  Introduction to Ecology |
 75%
AIIMS - 2001
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