Question

Tendris of Cucurbita and thorns of Bougainvillea are

• A. Homologous organs
• B. Analogous organs
• C. Vestigial organs
• D. Atavistic divergence

Answer 1

The correct option is A Homologous organs

Homologous organs are adapted to perform different functions and have different appearance but share common basic structural plan and origin. Homologous organs exhibit divergent evolution i.e., evolution of organisms in different directions from a common ancestry. Thorns of Bougainvillea and tendrils of Cucurbita are modified branches, present in axil of leaves (common origin and same basic structure). Tendrils help the plant in climbing, while thorns protect the plants from predators (functionally different). This makes them homologous structures.