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

Question

• Cyanobacteria were the first photosynthesizing organisms
• Cyanobacteria have complex cells containing a nucleus
- • Cyanobacteria lived in the ocean
• Cyanobacteria decreased the levels of oxygen in the atmosphere

Answer 1

The two correct statements that describe cyanobacteria are:

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

Cyanobacteria do not have complex cells containing a nucleus (they are prokaryotic), and they actually increased the levels of oxygen in the atmosphere through photosynthesis, not decreased them.