The following observations are arranged in ascending order. The median of the data is 15 find the value of x. 

8, 11, 12, x + 6, 17, 18, 23 

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#Question id: 15717

#Section 2: Evolution

 In The Origin of Species, Darwin propounded two major hypotheses:

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#Question id: 9197

#Section 2: Evolution

What is the biological significance of genetic diversity between populations?

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#Question id: 16803

#Section 4: Behavioural Ecology

At what height does a person experience altitude sickness?

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#Question id: 10737

#Section 1: Ecology

Which of the following statements is true?

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#Question id: 12310

#Section 1: Ecology

Which of the following statements about evolution of behavior is correct?