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.
Seaweed vs Algae. These are two interesting groups of organisms, or âplantsâ inhabiting aquatic ecosystems. Seaweeds include into a portion of algae, and that describes the relationship between these two.However, there are both similarities and differences between seaweeds and algae despite their inconsistency in classification, especially seaweeds.here are three types of seaweeds known as red, brown, and green with more than 10,000 species. Red algae is the group with the highest diversity containing over 6,000 species, and green has the least diversity with about 1,200 species.