In two separate boating incidents, one as a teenager on the Mississippi River and one on the Great Lakes, President Lincoln got his boats stuck in shallow waters, known as shoals.. These two experiences inspired Lincoln to invent a solution to help him navigate his boat through shallow waters.
Algae are simple plants. The biggest similarity with more  'regular' lants is that they both contain chlorophyll    Green algae and plants are sister taxon, that is, tâ¦hey share a  common ancestor.    For this reason, they both have double membrane bound plastids that  contain chlorophyll a and b.
1 A characteristic of red algae is that their plastids contain only one type of chlorophyll -- chlorophyll a. 2  This is different from Green algae and plants which have both chlorophyll a and b. 3  Dinoflagellates these evolved on a separate line that includes, surprisingly, the ciliated protists. A characteristic of red algae is that their plastids contain only one type of chlorophyll -- chlorophyll a. 2  This is different from Green algae and plants which have both chlorophyll a and b. 3  Dinoflagellates these evolved on a separate line that includes, surprisingly, the ciliated protists.