Assertion: gametophyte's tissue | /r/MadeOf | lignin
Facets:
Source sentences:
text: They do not have a true vascular tissue containing lignin (although some have specialized tissues for the transport of water)
text: Compared to other living land plants, they lack vascular tissue containing lignin and branched sporophytes bearing multiple sporangia.
text: Fern stems never become woody (composed of secondary tissue containing lignin), because all tissues of the plant body originate at the stem apex.
text: They do not have a true vascular tissue containing lignin (although some have specialized tissues for the transport of water)
text: Compared to other living land plants, they lack vascular tissue containing lignin and branched sporophytes bearing multiple sporangia.
text: However, the tissue doesn’t contain lignin, an essential protein found in true vascular tissue.