[blue-green algae; have no distinct nucleus or chloroplasts and do not reproduce sexually; contain chlorophyll a and can carry out oxygenic photosynthesis; the only organisms that fix both carbon dioxide and nitrogen; they are not true algae, but related to bacteria. ( CSP )]
UMLS (CSP) C1047211cyanobacteria
Cyanophyta
Relation/PAR: Monera
photosynthetic bacteria