Editing Rhizoid (section)

=== Algae ===
In certain [[algae]], there is an extensive rhizoidal system that allows the alga to anchor itself to a sandy substrate from which it can absorb nutrients.<ref>{{cite journal| doi=10.1016/j.aquabot.2009.10.012 | volume=92 | issue=2 | title=Comparative phosphate acquisition in giant-celled rhizophytic algae (Bryopsidales, Chlorophyta): Fleshy vs. calcified forms | year=2010 | journal=Aquatic Botany | pages=157–160 | vauthors = Demes KW, Littler MM, Littler DS }}</ref> Microscopic free-floating species, however, do not have rhizoids at all.<ref>{{cite book | vauthors = Smith GM | date = 1955 | title = Cryptogamic Botany, Volume 1 Algae and Fungi | publisher = McGraw-Hill Book Company Inc }}</ref>