Task: Text Categorization
Input (English): Plectosteles, present in some club mosses, have interconnected plates of this tissue, and whether a plant is ectophloic or amphiphloic is determined by whether this tissue is surrounded on both sides or on one. Its two principal forms may be differentiated by the size of one of their component cells, called tracheids, and another highly lignified type, vessel elements, are produced by the fusiform initials of angiosperms. While only the proto- and meta- forms exist in monocots, in dicots and gymnosperms, another form grows inward from the vascular cambium, called the "secondary" this. For 10 points, identify this plant tissue responsible for water and mineral transport, complemented by the phloem.
Output (English): Science