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.
Green algae use each cell to absorb water directly from the source  while plants have connective tissue that transport water from the  source to all of its parts. The other â¦ difference is that plants are  multicellular and green algae do have single cells. 2 people found this useful.