Bicollateral vascular bundles are found in

Options

A. (a) Helianthus
B. (b) Zea mays
C. (c) Cucurbita
D. (d) Dracaena

Answer

**Step-by-Step Solution:**

1. **Understanding Vascular Bundles**: Vascular bundles are the part of the plant that contains xylem and phloem, which are responsible for the transport of water, nutrients, and food throughout the plant.

2. **Definition of Bicollateral Vascular Bundles**: Bicollateral vascular bundles are a specific type of vascular bundle where there are two strands of phloem and one strand of xylem. The arrangement is such that one phloem strand is located above the xylem and the other below it.

3. **Structure of Bicollateral Vascular Bundles**: In a bicollateral vascular bundle, the xylem is situated in the center, with one phloem strand on the upper side and another on the lower side. The inner and outer cambium separates the xylem and phloem.

4. **Identifying the Family**: Bicollateral vascular bundles are primarily found in plants belonging to the family Cucurbitaceae, which includes various species such as Cucurbita (squash and pumpkins).

5. **Analyzing the Options**:
- Option A: Helianthus (Sunflower) - does not have bicollateral bundles.
- Option B: Zemes - does not have bicollateral bundles.
- Option C: Cucurbita - known to have bicollateral vascular bundles.
- Option D: Dracaena - does not have bicollateral bundles.

6. **Conclusion**: Based on the information, the correct answer is option C, Cucurbita, as it is the only one listed that possesses bicollateral vascular bundles.

**Final Answer**: The correct answer is option C, Cucurbita.

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