What is advantage is conferred to algae and plants that possess sporopollenin?

The advantage that is conferred to algae and plants that have sporopollenin is that they have reproductive cells that are more resistant to desiccation. Remember that a sporopollenin is a polymer that is inert and makes up the outer layer of pollen grains and spores. Sporopollenin is also found in the cell walls of several taxa of green alga, including Phycopeltis