Why blue green algae kept in bacterial category ?
Cyanobacteria (blue-green algae) are bacteria because they show all the traits of prokaryotes. They have no organelles to perform specialized functions. Nitrogen-fixing in marine & fresh water environments is primarily done by Eubacteria (especially cyanobacteria) a role no Eukaryote can fill. . Prokarya have no nucleus just a circular chromosome with operons to control gene ratios (no introns or mRNA modifications). This makes bacteria very quick, their life processes having fewer controls can proceed at a faster pace. They reproduce asexually by fission, budding or filament fragmentation. Algae are Eukaryotic cells with organelles including chloroplasts that specialize in fixing carbon in photosynthesis, other organelles include mitochondria and a nucleus. Algae have little sexual reproduction but they are capable of it.
