Final answer:
The photosynthetic organ that contains vascular tissue is the leaf. The leaf contains vascular bundles composed of xylem and phloem tissues, which transport water, minerals, and photosynthetic products.
Step-by-step explanation:
The photosynthetic organ that contains one or more bundles of vascular tissue is the leaf. Like the stem, the leaf contains vascular bundles composed of xylem and phloem tissues. A single vascular bundle always contains both xylem and phloem tissues, and they transport water, minerals, and photosynthetic products throughout the plant.