Question

Select the 2 correct statements that describe cyanobacteria.(1 point)
Responses

Cyanobacteria decreased the levels of oxygen in the atmosphere

Cyanobacteria lived in the ocean

Cyanobacteria were the first photosynthesizing organisms

Cyanobacteria have complex cells containing a nucleus

Answer 1

Cyanobacteria lived in the ocean
Cyanobacteria were the first photosynthesizing organisms