Gymnosperms with vessels are

Options

A. Cycadales
B. Coniferales
C. Gnetales
D. Ginkgoales.

Answer

To answer the question "Gymnosperms with vessels are," we need to analyze the options provided and understand the characteristics of gymnosperms.

### Step-by-step Solution:

1. **Understanding Gymnosperms**:
- Gymnosperms are a group of seed-producing plants that include conifers, cycads, Ginkgo, and gnetophytes. The term "gymnosperm" means "naked seeds," indicating that their seeds are not enclosed in an ovary.

2. **Components of Xylem**:
- Xylem is the vascular tissue responsible for the transport of water and nutrients in plants. It consists of several components, including:
- Xylem tracheids
- Xylem vessels
- Xylem parenchyma
- Xylem fibers
- Among these components, vessels are specialized structures that are efficient in conducting water.

3. **Characteristics of Gymnosperms**:
- Most gymnosperms, particularly conifers, do not have vessels in their xylem; instead, they primarily have tracheids for water conduction. However, some gymnosperms, such as gnetophytes, do possess vessels.

4. **Analyzing the Options**:
- **Option 1: Psychedelics** - This is not a recognized group of gymnosperms.
- **Option 2: Coniferous** - This refers to conifers, which typically lack vessels and only have tracheids.
- **Option 3: Nettles** - This is not a gymnosperm; it refers to a group of flowering plants (angiosperms).
- **Option 4: Ginkgo** - Ginkgo biloba is a gymnosperm that possesses vessels in its xylem.

5. **Conclusion**:
- The correct answer to the question "Gymnosperms with vessels are" is **Ginkgo** (not listed in the options but is a valid example). However, if we strictly consider the options, none of them correctly identify a gymnosperm with vessels.

### Final Answer:
Since none of the options provided are correct, the answer is that gymnosperms with vessels include Ginkgo, which is not listed.