Pycnoxylic and manoxylic wood is present in

Options

A. Pinus
B. Cycas
C. Ginkgo
D. Gnetum

Answer

### Step-by-Step Solution:

1. **Understanding the Types of Wood**:
- There are two types of woods mentioned in the question: Pycnoxylic and Manoxylic.
- Pycnoxylic wood is characterized by having a lower amount of parenchyma and a higher amount of tracheids in the xylem.
- Manoxylic wood, on the other hand, contains a larger amount of parenchyma and a smaller amount of tracheids in the xylem.

2. **Identifying Characteristics**:
- Pycnoxylic wood is known for being durable and is often used in construction.
- Manoxylic wood is non-durable and is typically used for commercial purposes.

3. **Examples of Each Type**:
- An example of Pycnoxylic wood is **Pinus** (pine trees).
- An example of Manoxylic wood is **Cycus** (cycads).

4. **Analyzing the Options**:
- The options given are:
1. Pinus
2. Cycus
3. Ginkgo
4. Neatum
- From our earlier identification, we know:
- **Pinus** corresponds to Pycnoxylic wood.
- **Cycus** corresponds to Manoxylic wood.

5. **Conclusion**:
- Therefore, the correct answer to the question is that **Pinus** has Pycnoxylic wood and **Cycus** has Manoxylic wood.

### Final Answer:
- Pycnoxylic wood is present in **Pinus** and Manoxylic wood is present in **Cycus**.

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