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.
Plant-Like Protists (Red, Brown, and Green Algae) 1) Red Algae: live deep in the water, can harvest light energy very well, contains chlorophyll A and phycobilins; commonly referred to as seaweeds. 2) Brown Algae: contain chlorophyll a and c and a brown pigment called fucoxanthin, largest and most complex algae, found in shallow, cool, costal water.