The least number of five digits which is exactly divisible by 12,15 and 18, is :

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#Question id: 11930

#Section 1: Ecology

When females are equally successful in raising young on monogamous and polygynous male territories, the population is said to have reached the: 

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#Question id: 11931

#Section 1: Ecology

Sexual dimorphism may arise from: 

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#Question id: 11932

#Section 1: Ecology

According to the hamilton-zuk hypothesis, a female bird is most likely to select a male as a mate that has: 

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#Question id: 12140

#Section 1: Ecology

In some animal species, social organization involves the establishment of a system of ordered social rank instead of the occupancy of territories. Such a system of ordered social rank is referred to as a __________. 

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#Question id: 12141

#Section 1: Ecology

The density and spacing of individuals within suitable habitat and the proportions of individuals in each age class comprise a population's __________. 

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#Question id: 12142

#Section 1: Ecology

Regarding the geographic range of a species, which of the following statements is true?