This tissue obeys a law which was originally formulated with reference to the circulatory and respiratory systems, Murray's law.
One component of this tissue initially developed in organisms of the genus Selaginella during the Permian. This tissue obeys a law which was originally formulated with reference to the circulatory and respiratory systems, Murray's law. Some early vascular plants possessed a core of this tissue surrounded by another type of tissue; those two tissues together are called a (*) protostele. This tissue develops from the "proto" form to the "meta" form, which has larger cells, and there are four main patterns for its development, all of which have names ending in the suffix "-arch." Gymnosperms possess this tissue's tracheids, but lack the vessel elements which are found in this tissue in angiosperms. Its primary function takes place via transpirational pull and root pressure. For 10 points, name this tissue which transports water in vascular plants, not to be confused with phloem.
One component of this tissue initially developed in organisms of the genus Selaginella during the Permian.
xylem