In a stem, the vascular bundles and xylary elements are ……………..and ……………… respectively,

Options

A. Radial, endarch
B. Radial, exarch
C. Conjoint, endarch
D. Conjoint, exarch

Answer

To answer the question, "In a stem, the vascular bundles and xylary elements are ……………..and ……………… respectively," we need to analyze the types of vascular bundles and xylary elements found in stems.

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**:
- Vascular bundles are arrangements of xylem and phloem in plants. In stems, the arrangement of vascular bundles is typically "conjoined," meaning that xylem and phloem are found together in the same bundle.

2. **Identifying Xylary Elements**:
- Xylary elements refer specifically to the xylem tissue. In stems, the arrangement of xylem can be classified as "endarch." In the endarch condition, the protoxylem (the first formed xylem) is located towards the center of the stem, while the metaxylem (the later formed xylem) is located towards the outside.

3. **Combining the Information**:
- Therefore, in a stem, the vascular bundles are "conjoined" and the xylary elements are "endarch."

4. **Final Answer**:
- In a stem, the vascular bundles and xylary elements are **conjoined** and **endarch** respectively.