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Thorn of Bougainvillea and tendril of Cu...

Thorn of Bougainvillea and tendril of Cucurbita are examples of `:`

A

vestigial organs

B

retrogressive evolution

C

analogous organs

D

homologous organs

Text Solution

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The correct Answer is:
To solve the question regarding the thorn of Bougainvillea and the tendril of Cucurbita, we need to identify what type of plant structures they represent. ### Step-by-Step Solution: 1. **Understanding the Structures**: - The thorn of Bougainvillea is a modified branch that serves the purpose of protection for the plant. - The tendril of Cucurbita (commonly known as squash or pumpkin) is also a modified branch but serves the purpose of climbing and support. 2. **Identifying the Type of Modification**: - Both the thorn and the tendril are derived from the same basic plant structure (the branch) but have evolved to serve different functions. This indicates that they have a similar structural origin. 3. **Differentiating Between Organ Types**: - We need to differentiate between homologous and analogous structures: - **Homologous Structures**: These are structures that have a similar origin (anatomical structure) but may serve different functions. - **Analogous Structures**: These are structures that serve similar functions but have different origins and structures. 4. **Conclusion**: - Since both the thorn of Bougainvillea and the tendril of Cucurbita are modified branches (similar in structure) but serve different functions (protection vs. climbing), they are classified as **homologous organs**. Thus, the correct answer is **Homologous organs**.
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{:("Convergent evolution","Divergent evolution"),((1)"Bones of forelimbs of vertebrates","Wings of butterfly and birds"),((2)"Thorns of Bougainvillia and tendrils of Cucurbita","Eyes of Octopus and Mammals"),((3)"Eyes of octopus and mammals","Bones of forelimbs of vertebrates"),((4)"Thorns of Bougainvillia and tendrils of Cucurbita","Wings of butterflies and birds"):}

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Thorn of Bougainvillea is modified

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