Does algae has auxin?

Yes, Brown algae differs from Red and Green algae because Brown algae is used as a thickener in alot of foods. Red and Green algae are used for most of the time for fish and other underwater animals...

Algae are simple plants that live in water or in damp areas.

If human body have hormones, same true with plants and this plant hormones called auxin. It is a substance naturally produced in actively growing parts of plants that regulate many aspects of plant...

Auxins affect cell elongation (tropism), apical dominance, and fruit drop or retention

You just have water and don't change it 'til 10 days