The thorn of Bougainvillea and the tendril of Cucurbita are examples of

Retrogressive evolution

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Vestigial organs

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Analogous organs

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Homologous organs

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Solution

The correct option is D
Homologous organs

Homologous organs are the organs which exhibit anatomical similarities but perform different function.

The thorn of Bougainvillea and the tendril of Cucurbita are modifications of stem. Both arise from the axillary bud. Thorns provide protection to plants, while tendrils provide support to the climbing plant.

Suggest Corrections

Column I	Column II
(A) Tendril of Passiflora and thorn of Bougainvillea	(p) Fossil invertibrates
(B) Eyes in insects and octopus	(q) Homologous organs
(C) Nictitating membrane and vermiform appendix in man	(r) Analogous organs
(D) Ammonite and Trilobite	(s) Vestigial organs