The given age pyramid represents a:

1. Fast expanding population

2. Slowly expanding population

3. Stable population

4. Declining population

Subtopic:  Population Characters: Age Structure & Migration |
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Darwinian fitness is represented by:

1. Low r value

2. High r value

3. High K value

4. Low K value

Subtopic:  Life History Variations |
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Under a particular set of selection pressures, organisms evolve towards the most efficient:

1. Thermoregulation

2. Water conservation

3. Respiration

4. Reproduction strategy

Subtopic:  Life History Variations |
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A population interaction where one species is harmed whereas the other is unaffected is called as:

(1) Mutualism

(2) Competition

(3) Predation

(4) Amensalism

Subtopic:  Population Interactions: Amensalism |
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When certain exotic species are introduced into a geographical area, they become invasive mainly because:

1. The invaded land has unlimited resources for the introduced species

2. The invaded land does not have its natural predator

3. The population of the introduced species in the invaded land is very low

4. Introduced species do not face any competition in the introduced land

Subtopic:  Population Interactions: Predation |
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In a field experiment, when all Pisaster starfish were removed from an enclosed intertidal area, the result was:

1. Increase in diversity of invertebrates

2. Extinction of many invertebrate species

3. Inability of the Pisaster to enter the area again

4. Replacement of Pisaster by other starfish

Subtopic:  Population Interactions: Predation |
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A species whose distribution is restricted to a small geographical area because of the presence of a competitively superior species is found to expand its distributional range dramatically when the competing species is experimentally removed. This is called:

1. Competitive Exclusion

2. Competitive Release

3. Competitive Supremacy

4. Competitive Inclusion

Subtopic:  Population Interactions: Competition |
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Which of the following is not an ectoparasite?

1. Lice on humans

2. Copepods on marine fishes

3. Mistletoe on other plants

4. Female Anopheles on humans

Subtopic:  Population Interactions: Parasitism |
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To get pollinated by a bee, the Mediterranean Orchid, Ophrys, employs:

1. Sexual deceit

2. Pseudo-copulation

3. Reward in the form of Nectar

4. Place for laying eggs

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
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While heat gain or heat loss is the function of ______, heat production is the function of ________ of the body of an animal.

1. Volume; Surface area

2. Surface area; Volume

3. Volume; Volume

4. Surface area; Surface area

Subtopic:  Response of Organisms to Abiotic Factors |
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