The homeobox gene ARBORKNOX1 is expressed in a tissue of this type.
The homeobox gene ARBORKNOX1 is expressed in a tissue of this type. The interfascicular form of this tissue is surrounded by vascular bundles in the parenchyma. A tissue of this type differentiates into a structure that consists of haplo, actino and plecto varieties. That is the protostele. Another type of this tissue is comprised of ray and fusiform initials. That type of this tissue gives rise to phloem from its outer surface. A type of this tissue generates a protective multilayer covering in gymnosperms called the periderm. This tissue comes in pro-, cork- and vascular varieties. For 10 points, name this type of meristem that provides undifferentiated cells for tissue growth.
The homeobox gene ARBORKNOX1 is expressed in a tissue of this type.
cambium [or vascular cambium; or cork cambium; or procambium; prompt on \"meristem\"]