Prokaryotes (Bacteria)

Cyanobacteria

Photosynthetic bacteria; often filamentous.

Nostoc sp.

autotrophic.

Cyanobacteria

Photosynthetic bacteria; often filamentous.

Anabaena sp.

Arrow indicates nitrogen fixing heterocyst

autotrophic.

Cyanobacteria

Photosynthetic bacteria; often filamentous.

Oscillatoria sp.

autotrophic.

Streptococcus pneumoniae

heterotrophic.