<P> Cyanobacteria blooms can contain lethal cyanotoxins </P> <Li> <P> The chloroplasts of glaucophytes have a peptidoglycan layer, evidence suggesting their endosymbiotic origin from cyanobacteria . </P> </Li> <P> The chloroplasts of glaucophytes have a peptidoglycan layer, evidence suggesting their endosymbiotic origin from cyanobacteria . </P> <Li> <P> Bacteria can be beneficial . This Pompeii worm, an extremophile found only at hydrothermal vents, has a protective cover of bacteria . </P> </Li>

What are tiny plants that live in the seas called