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Two genera that produce racemose and cym...

Two genera that produce racemose and cymose inflorescences respectively are

A

Crotalaria and Allium

B

Ipomoea and Helianthus

C

Crotalaria and Ipomoea

D

Allium and Helianthus

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The correct Answer is:
To answer the question about two genera that produce racemose and cymose inflorescences respectively, we can follow these steps: ### Step 1: Understand the Types of Inflorescences - **Racemose Inflorescence**: This type of inflorescence has a main axis that continues to grow, and flowers are borne laterally along this axis. The flowers bloom from the bottom upwards, allowing for continuous growth. - **Cymose Inflorescence**: In this type, the main axis terminates in a flower, and growth occurs laterally. The flowers bloom from the top downwards, leading to a more compact arrangement. **Hint**: Remember the key characteristics of racemose and cymose inflorescences to differentiate between them. ### Step 2: Identify Genera with Racemose Inflorescence - One example of a genus that exhibits racemose inflorescence is **Crotalaria**. In this genus, flowers are arranged along the sides of a continuously growing stem. **Hint**: Look for plants that have a tall growth habit with flowers developing along the sides. ### Step 3: Identify Genera with Cymose Inflorescence - An example of a genus that exhibits cymose inflorescence is **Ipomoea**. In this genus, the flowers are arranged in a way that the main stem ends in a flower, and lateral growth occurs. **Hint**: Consider plants that have a more compact structure with flowers developing at the tips. ### Step 4: Conclusion Based on the above analysis, the two genera that produce: - **Racemose Inflorescence**: Crotalaria - **Cymose Inflorescence**: Ipomoea Thus, the answer to the question is: - **Crotalaria** for racemose inflorescence - **Ipomoea** for cymose inflorescence **Final Answer**: Crotalaria (racemose) and Ipomoea (cymose).
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