Niche is

1. All the biological factors in the organism environment
2. The physical space where an organism live
3. The range of temperature that the organism needs to live
4. The functional role played by the organism where it lives

Subtopic:  Introduction to Ecology |
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Natality refers to
1. Death rate
2. Birth rate
3. Number of individuals leaving the habitat
4. Number of individuals entering the habitat

 

Subtopic:  Population Characters: Natality & Mortality |
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In a growing population of a country
1. pre-reproductive individuals are more than reproductive individuals.
2. reproductive individuals are less than post-reproductive individuals.
3. reproductive and pre-reproductive individuals are equal in number.
4. pre-reproductive individuals are less than reproductive individuals.
Subtopic:  Population Characters: Age Structure & Migration |
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Which one of the following population interactions is widely used in medical science for the production of antibiotics ?

1. Commensalism
2. Mutualism
3. Parasitism
4. Amensalism

Subtopic:  Population Interactions: Amensalism |
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Asymptote in a logistic growth curve is obtained, when

(1) The value of 'r' approaches zero

(2) K = N

(3) K > N

(4) K < N

Subtopic:  Population: Logistic Growth Model |
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Mycorrhizae are the example of

(1) fungistasis                 

(2) amensalism

(3) antibiosis                   

(4) mutualism

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
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Asymptote in a logistic growth curve is obtained when:

1. K=N

2. K>N

3. K<N

4. The value of 'r' approaches zero

Subtopic:  Population: Logistic Growth Model |
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Mycorrhizae are the example of:

1. Amensalism

2. Antibiosis

3. Mutualism

4. Fungistasis

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
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Which of the following is correct for r-selected species?

(1) Large number of progeny with small size

(2) Large number of progeny with large size

(3) Small number of progeny with small size

(4) Small number of progeny with large size

Subtopic:  Life History Variations |
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If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to

(1) Mutualism

(2) Amensalism

(3) Commensalism

(4) Parasitism

Subtopic:  Population Interactions: Parasitism |
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