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(D) The structures $P$ (thorns of Bougainvillea) and $Q$ (tendrils of Cucurbita) are examples of homologous organs.Homologous organs are those that ha

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Divergent evolution,Homologous organs

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(D) The structures $P$ (thorns of Bougainvillea) and $Q$ (tendrils of Cucurbita) are examples of homologous organs.Homologous organs are those that have a similar anatomical origin and developmental pattern but perform different functions.These structures arise from the same ancestral origin but evolve to perform different functions in different environments,which is a characteristic of divergent evolution.Therefore,the correct option is Divergent evolution and Homologous organs.

Select the correct option for the structures $P$ and $Q$ shown below.

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