This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Nostoc communis. en Nostoc Cyanobacteria from Castelltallat Catalonia ca Nostoc Cianobacteri de Castelltallat Bages own Victor Vicente Selvas 'N Nostoc commune Serra de Castelltallat
Page 2023 Free-images.com. All images are Public Domain