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Twisted aestivation and axile placentati...

Twisted aestivation and axile placentation are found in:

A

China rose

B

Dianthus

C

Sunflower

D

Mustard

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding twisted aestivation and axile placentation, we will analyze the options provided: China rose, Dianthus, and Mustard. ### Step-by-Step Solution: 1. **Understanding Aestivation and Placentation**: - **Aestivation** refers to the arrangement of floral parts (like petals and sepals) in a flower bud before it opens. - **Placentation** refers to the arrangement of ovules within the ovary of a flower. 2. **Analyzing the Options**: - **China Rose (Hibiscus rosa-sinensis)**: - Known for having **twisted aestivation** where the petals overlap each other in a twisted manner. - It exhibits **axile placentation**, where the ovules are attached to the central axis of the ovary. - **Dianthus**: - Exhibits **valvate aestivation**, where the petals meet at the edges without overlapping. - It has **free central placentation**, where the ovules are attached to a central column, not the walls of the ovary. - **Mustard**: - Displays **valvate aestivation** as well. - The placentation is **parietal**, where the ovules are attached to the walls of the ovary. 3. **Conclusion**: - Based on the characteristics of each option, **China Rose** is the only plant that has both twisted aestivation and axile placentation. ### Final Answer: The correct answer is **China Rose**. ---
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