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Choose the homologous organs from the gi...

Choose the homologous organs from the given options .
I. Vertebrate hearts
II. Vertebrate brains
III. Thorn and tendrils of Bougainvillea and Cucurbita
IV. Sweet potato & potato
The correct combination is

A

I and II

B

II and III

C

III and IV

D

I ,II and III

Text Solution

AI Generated Solution

The correct Answer is:
To determine the homologous organs from the given options, we need to understand the concept of homologous structures. Homologous organs are those that share a common origin and basic structure but may have different functions. ### Step-by-Step Solution: 1. **Understand Homologous Structures**: - Homologous organs arise from a common ancestor and have similar anatomical features, even if they serve different functions in the organisms. 2. **Analyze the Options**: - **I. Vertebrate hearts**: - All vertebrates (fish, amphibians, reptiles, birds, mammals) have hearts that are structurally similar (chambered hearts), despite differences in function and complexity. Thus, vertebrate hearts are homologous. - **II. Vertebrate brains**: - Similarly, vertebrate brains share a common structure (neurons, neural canals) across different species, even though their functions may vary based on the organism's needs. Therefore, vertebrate brains are also homologous. - **III. Thorn and tendrils of Bougainvillea and Cucurbita**: - Both thorns and tendrils are modifications of auxiliary buds. They have a similar origin but serve different functions (protection vs. climbing), making them homologous. - **IV. Sweet potato & potato**: - Sweet potato is a root tuber, while potato is a stem tuber. They serve the same function (food storage) but have different structures, indicating they are analogous, not homologous. 3. **Conclusion**: - The homologous organs from the options are: - I. Vertebrate hearts - II. Vertebrate brains - III. Thorn and tendrils of Bougainvillea and Cucurbita - The correct combination is **I, II, and III**. ### Final Answer: The correct combination of homologous organs is **I, II, and III**. ---
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