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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The principle of competitive exclusion was stated by

1.  C. Darwin

2.  G. F. Gause

3.  MacArthur

4.  Verhulst and Pearl

Subtopic:  Population Interactions: Competition |
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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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It is much easier for a small animal to run Uphill than for a large animal, because
1. smaller animals have a higher metabolic rate
2. small animals have a lower O2 requirement
3. the efficiency of muscles in large animals is less than in the small animals
4. it is easier to carry a small body weight

 

Subtopic:  Response of Organisms to Abiotic Factors | Adaptations |
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When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K):
1. when N nears the carrying capacity of the habitat
2. when N/K equals zero
3. when the death rate is greater than the birth rate
4. when N/K is exactly one
Subtopic:  Population: Logistic Growth Model |
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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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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:  Population: Exponential Growth Model | Population: Logistic Growth Model |
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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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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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Niche is:
1. All the biological factors in the organism environment
2. The physical space where an organism lives
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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