An association of individuals of different species living in the same habitat and having functional interactions is known as:

1. Ecological niche

2. Biotic community

3. Ecosystem

4. Population

Subtopic:  Introduction to Ecology |
From NCERT
NEET - 2015
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In which of the following interactions both partners are adversely affected?

1. Competition  2. Predation
3. Parasitism 4. Mutualism
Subtopic:  Population Interactions: Competition |
 88%
From NCERT
NEET - 2015
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The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is that:

333402
 
1. both plant populations in this habitat decreased
2. population-B competed more successfully for food than population-A
3. population-A produced more offspring than population-B
4. population-A consumed the members of population-B

Subtopic:  Population Interactions: Competition |
 88%
NEET - 2015
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A sedentary sea anemone gets attached to the shell lining of a hermit crab. The association is:

1. Symbiosis

2. Commensalism

3. Amensalism

4. Ectoparasitism

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
AIPMT - 2013
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A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:

1. 15

2. 05

3. zero

4. 10

Subtopic:  Population Characters: Density |
 91%
From NCERT
AIPMT - 2013
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According to Darwin, organic evolution is due to:

1.  Interspecific competition.
2.  Competition within closely related species.
3.  Reduced feeding efficiency in one species due to the presence of interfering species.
4.  Intraspecific competition.

Subtopic:  Population Interactions: Competition |
 66%
From NCERT
AIPMT - 2013
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The age pyramid with broad base indicates:
1. high percentage of old individuals
2. low percentage of young individuals
3. a stable population
4. high percentage of young individuals 
Subtopic:  Age Pyramid |
 80%
From NCERT
NEET - 2013
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Which one of the following is not a parasitic adaptation?
1. Development of adhesive organs
2. Loss of digestive organs
3. Loss of reproductive capacity
4. Loss of unnecessary sense organs
Subtopic:  Population Interactions: Parasitism |
 75%
From NCERT
NEET - 2013
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Cuscuta is an example of:
1.  Brood parasitism
2.  Predation
3.  Endoparasitism
4.  Ectoparasitism

Subtopic:  Population Interactions: Parasitism |
 69%
AIPMT - 2012
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What type of human population is represented by the following age pyramid? 

  
1.  Stable population
2.  Declining population
3.  Expanding population
4.  Vanishing population
Subtopic:  Population Characters: Age Structure & Migration |
 84%
From NCERT
AIPMT - 2011
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