What is Phaeophyceae?Give its common known forms.

Answer:

 Introduction: The brown algae, containing the class Phaeophyceae from stramenpile, are a group of multicellular algae,     Example – seaweeds.

 It is mainly present in cold water and some are present in marine water.

 Brown algae contains brown pigment fucoxanthin. This pigment gives that greenish-brown color.

 Brown algae vary in size ranges like from small filamentous epiphytes like Ectocarpus to complex giant Kelps , in which   size from 1 to more than 100 metres in height example- Nerocystis.