Where is the xylem tissue located in dicots?

The correct answer highlights the position of xylem tissue in dicots, which is situated on the inside of the vascular system. In dicotyledonous plants, the xylem is responsible for transporting water and minerals from the roots to the rest of the plant. It is typically located towards the center of the stem, surrounded by phloem tissue, which transports the products of photosynthesis. This arrangement is crucial for the efficient functioning of the plant's vascular system, as it allows for effective transport and growth.

In dicots, this internal placement of xylem is especially important for the structural support it provides, as well as its role in the plant's overall water transport system. The formation of a vascular cambium layer between the xylem and phloem further allows for secondary growth, contributing to the thickening of stems and branches over time.

The other options incorrectly place the xylem in locations that do not reflect its actual anatomical position within dicots, such as on the outside or immediately under the bark, which pertains more to phloem or other plant structures rather than the essential internal role that xylem plays.