chlorophyta: large division of chiefly freshwater eukaryotic algae that possess chlorophyll a and b, store food as starch, and cellulose cell walls; classes Chlorophyceae, Ulvophyceae, and Charophyceae; obviously ancestral to land plants
carbamic acid: an acid that is known only by virtue of its salts (as ammonium carbamate) or its esters (as urethane)