Question

Select the 2 correct statements that describe cyanobacteria.(1 point) Responses Cyanobacteria were the first photosynthesizing organisms Cyanobacteria were the first photosynthesizing organisms Cyanobacteria decreased the levels of oxygen in the atmosphere Cyanobacteria decreased the levels of oxygen in the atmosphere Cyanobacteria lived in the ocean Cyanobacteria lived in the ocean Cyanobacteria have complex cells containing a nucleus

Answer 1

The two correct statements that describe cyanobacteria are:

1. Cyanobacteria were the first photosynthesizing organisms.
2. Cyanobacteria lived in the ocean.

Cyanobacteria are known for their role in the production of oxygen through photosynthesis, significantly contributing to the increase in atmospheric oxygen levels, rather than decreasing them. Additionally, cyanobacteria are prokaryotic organisms, meaning they do not contain a nucleus.