Diatoms are another photosynthetic lineage of heterokonts. They are unicellular organisms surrounded by a silica frustule. Diatoms are an incredibly diverse group of unicellular organisms containing a...Diatoms are another photosynthetic lineage of heterokonts. They are unicellular organisms surrounded by a silica frustule. Diatoms are an incredibly diverse group of unicellular organisms containing anywhere from 20,000 to 2 million species.
