Unlike a population, an individual has:

1. Birth and death 2. Birth rate
3. Death rate 4. Sex ratio

Subtopic:  Population Attributes |
 91%
From NCERT
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The tiger census in our national parks and tiger reserves is often based on:
1. Pug marks
2. Cub count
3. Area allocation
4. Collar position
Subtopic:  Population Attributes |
 94%
From NCERT
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As a mechanism of defense against herbivory, Calotropis:
1. Has a large number of thorns
2. Secretes cardiac glycosides
3. Produces a neurotoxin, strychnine
4. Releases a hallucinogen

Subtopic:  Population Interactions: Predation |
 86%
From NCERT
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The maximum population size of the species that the environment can sustain indefinitely is called as:
1. biotic potential
2. natality
3. environmental resistance
4. carrying capacity

Subtopic:  Population Dynamic |
 73%
From NCERT
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The growth rate of a natural population equals zero:

1.  when N/K is exactly one
2.  when N nears the carrying capacity of the habitat
3.  when N/K equals zero
4.  when mortality is greater than natality
Subtopic:  Population: Logistic Growth Model |
 75%
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion(A): A population that fits the logistic growth model increases more rapidly at intermediate size rather than at relatively small and large sizes.
Reason (R): The population growth rate decreases dramatically as the population size approaches the carrying capacity.
 
In the light of the above statements, choose the most appropriate answer from the options given below :
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

Subtopic:  Population: Logistic Growth Model |
 51%
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The competitive exclusion principle can be best expressed as:

1.  the more abundant species will exclude the less abundant species through competition
2.  competition for the same resources excludes species having different lifestyles
3.  no two species can occupy the same niche indefinitely when resources are limited
4.  larger organisms exclude smaller ones through competition as in the case of large trees controlling underbrush
Subtopic:  Population Interactions: Competition |
 73%
From NCERT
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The two species physically interfere with one another by aggressively attempting to exclude one another from particular habitats in:
1. competitive exclusion
2. predation
3. exploitative competition
4. interference competition

Subtopic:  Population Interactions: Competition |
From NCERT
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Which of the following links ecology to population genetics and evolution?

1. Organismic ecology 2. Population ecology
3. Ecosystem ecology 4. Biome ecology

Subtopic:  Introduction to Ecology |
 66%
From NCERT
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Which of the following is not usually an adaptation for a parasitic mode of life?

1. Loss of unnecessary sense organs
2. Presence of adhesive organs or suckers
3. Loss of the digestive system
4. Low reproductive capacity
Subtopic:  Population Interactions: Parasitism |
 87%
From NCERT
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