To solve the question of selecting an incorrect statement regarding the morphology of flowering plants, we will analyze each statement provided and determine their correctness step by step.
### Step-by-Step Solution:
1. **Understanding the Question**: The task is to identify which of the given statements about the morphology of flowering plants is incorrect.
2. **Analyzing Statement 1**:
- Statement: "The stem is the descending part of the axis bearing branches, leaves, flowers, and fruits."
- Analysis: This statement is incorrect because the stem is actually the ascending part of the plant axis. The stem grows upwards and supports the plant, bearing branches, leaves, flowers, and fruits. Therefore, this statement is incorrect.
3. **Analyzing Statement 2**:
- Statement: "The stem is generally green when young and later often becomes woody and dark brown."
- Analysis: This statement is correct. Young stems are typically green due to chlorophyll, and as they mature, they often become woody and dark brown.
4. **Analyzing Statement 3**:
- Statement: "Some stems perform the function of vegetative propagation."
- Analysis: This statement is also correct. Certain stem modifications, such as offsets, stolons, and runners, allow for vegetative propagation, which is a method of asexual reproduction.
5. **Analyzing Statement 4**:
- Statement: "The region of the stem where leaves are born are called nodes."
- Analysis: This statement is correct. Nodes are the points on the stem where leaves, branches, or flowers are attached, and the space between two nodes is called an internode.
6. **Conclusion**: After analyzing all the statements, we find that Statement 1 is the only incorrect statement. Therefore, the answer to the question is that the incorrect statement is Statement 1.
### Final Answer:
The incorrect statement is: "The stem is the descending part of the axis bearing branches, leaves, flowers, and fruits."
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