Leaves of angiosperms show these vascular bundles

Options

A. Bicollateral
B. Conjoint and closed
C. Conjoint and open
D. Radial

Answer

To answer the question regarding the type of vascular bundles present in the leaves of angiosperms, we will analyze each option provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**:
- Vascular bundles are the structures that contain xylem and phloem, which are responsible for the transport of water, nutrients, and food in plants.

2. **Evaluating Option 1: Bicolateral**:
- Bicolateral vascular bundles have one strand of xylem and two strands of phloem.
- These are specifically found in members of the Cucurbitaceae family (like cucumbers and pumpkins).
- Since this type is not common in all angiosperms, this option is not correct.

3. **Evaluating Option 2: Conjoint and Closed**:
- In this type, both xylem and phloem are located on the same radius, and there is no cambium present.
- This type is commonly found in monocot stems and the leaves of plants.
- Given that angiosperms include both monocots and dicots, this option is a strong candidate.

4. **Evaluating Option 3: Conjoint and Open**:
- Similar to the conjoint and closed type, the xylem and phloem are on the same radius, but here, cambium is present.
- This type is typically found in dicot stems.
- Since we are looking for vascular bundles in leaves of angiosperms, this option does not fit as well as option 2.

5. **Evaluating Option 4: Radial**:
- In radial vascular bundles, xylem and phloem are located on different radii.
- This type is generally found in roots, not in leaves.
- Therefore, this option is also incorrect.

6. **Conclusion**:
- After evaluating all options, the correct answer is **Option 2: Conjoint and Closed**. This type of vascular bundle is present in the leaves of angiosperms.

### Final Answer:
The leaves of angiosperms show **conjoint and closed** vascular bundles.