Question

What is the difference between nostoc and pencillum

Answer 1

Like most blue-green algae, Nostoc contains two pigments, blue phycocyanin and red phycoerythrin, as well as chlorophyll, and has the ability to fix nitrogen in specialized cells called heterocysts. A terrestrial species has been used as a supplementary food source in Asia.

a blue mould that is common on food, being added to some cheeses and used sometimes to produce penicillin.