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Identify the incorrect expression from t...

Identify the incorrect expression from the following statements:

A

Phylloclades of Casuarina are differentiated into nodes and internodes

B

Suckers of Chrysenthemum are differentiated into nodes and internodes

C

Phyllodes of Acacia are differentiated into nodes and internodes

D

Bulb of Onion is differentiated into nodes and internodes

Text Solution

AI Generated Solution

The correct Answer is:
To identify the incorrect expression from the given statements, we will analyze each statement carefully based on the morphology of flowering plants. ### Step-by-Step Solution: 1. **Understanding the Root and Shoot Systems**: - The plant is divided into two main systems: the root system (below ground) and the shoot system (above ground). - The shoot system includes the stem, branches, leaves, and flowers. 2. **Identifying Nodes and Internodes**: - In the shoot system, the stem has distinct structures known as nodes (points where leaves or branches arise) and internodes (the segments between two nodes). - This structure is characteristic of stems. 3. **Analyzing the Statements**: - **Statement 1**: "In the phyloclad of Casuarina, we will find nodes and internodes." - **Analysis**: This is correct. A phyloclad is a modified stem that carries out photosynthesis and will have nodes and internodes. - **Statement 2**: "The suckers of the chrysanthemum are also differentiated in the nodes and internodes." - **Analysis**: This is also correct. Suckers are modified stems that can produce new plants and will have nodes and internodes. - **Statement 3**: "In the phyllodes of acacia, there will be nodes and internodes." - **Analysis**: This statement is incorrect. Phyllodes are modifications of the leaf petiole, not the stem. Therefore, they do not have nodes and internodes. - **Statement 4**: "In the bulb of onion, nodes and internodes will be seen in it." - **Analysis**: This is correct. The onion bulb is a modified stem that stores food and has nodes and internodes. 4. **Conclusion**: - The incorrect expression is found in Statement 3 regarding the phyllodes of acacia, as they do not exhibit nodes and internodes due to being a modification of the leaf stalk. ### Final Answer: The incorrect expression is: **"In the phyllodes of acacia, there will be nodes and internodes."**
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