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Eduncle posted an MCQ
December 30, 2019 • 18:28 pm 0 points
  • CSIR NET
  • Life Sciences

The above graph illustrates two lines that represent the immigration and extinction rates for an island based on its distance from mainland (solid line) and its size (dotted line). Which of the following is true for this island ?

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    Eduncle Best Answer

    Closer and larger island have higher immigration rate and lower extinction rate. Arriving colonists help sustain the presence of a species on a near island and prevent its extinction. Hence if you observe the graph the equilibrium point is reached, it has higher immigration rate as compared to extinction rate. Therefore option 3 is correct.

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