Select the incorrect statement w.r.t. Cycas

Options

A. Have specialised roots called coralloid roots which are associated with N2 fixing cyanobacteria
B. it is heterosporous
C. It has pinnate leaves which persist for few years,(
D. It bears branched stems

Answer

To solve the question regarding the incorrect statement about Cycas, we will analyze each statement provided in the options and determine which one is false.

### Step-by-Step Solution:

1. **Identify the Classification of Cycas**:
- Cycas is classified as a Gymnosperm. Gymnosperms are plants that do not produce flowers or fruits; instead, they have naked seeds. This statement is correct.

**Hint**: Remember that Gymnosperms are characterized by their seed structure, which is different from Angiosperms (flowering plants).

2. **Examine the Root Structure**:
- It is stated that Cycas has specialized roots called colloidal roots that are associated with nitrogen-fixing cyanobacteria. This is true, as Cycas roots form nodules that harbor these bacteria, which help in nitrogen fixation.

**Hint**: Look for the role of roots in nutrient acquisition, especially in plants that have symbiotic relationships.

3. **Check for Heterospory**:
- The statement mentions that Cycas is heterosporous, meaning it produces both male and female spores. This is also correct, as Cycas does produce two types of spores.

**Hint**: Recall the definitions of homospory and heterospory in plant reproduction.

4. **Analyze Leaf Structure**:
- The statement about Cycas having pinnately compound leaves that persist for a few years is accurate. Cycas leaves are indeed pinnate and can last for several years.

**Hint**: Consider the leaf morphology and longevity in different plant groups.

5. **Evaluate the Stem Structure**:
- The final statement claims that Cycas has a branched stem. This is incorrect. Cycas typically has an unbranched stem, which is thick and can appear like a trunk. While there may be some branching in mature plants, it is not characteristic of the species.

**Hint**: Think about the growth form of the plant and how it affects its overall structure.

### Conclusion:
The incorrect statement regarding Cycas is that it has a branched stem. Therefore, the answer to the question is the statement about the branched stem.