Gaoyi biology
D

Cyanobacteria and hydrilla verticillata are a kind of cyanobacteria and prokaryotes. Spirogyra is a eukaryotic organism.

Cyanobacteria and black algae have no chloroplasts, but they have pigments necessary for photosynthesis. Spirogyra has chloroplasts.

Spirogyra, cyanobacteria and black algae are autotrophs because they can carry out photosynthesis.