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

Cyanobacteria have complex cells containing a nucleus
Cyanobacteria have complex cells containing a nucleus

Cyanobacteria lived in the ocean
Cyanobacteria lived in the ocean

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

All Answers 1

Answered by GPT-5 mini AI
Correct choices:
- Cyanobacteria lived in the ocean
- Cyanobacteria were the first photosynthesizing organisms

(They are prokaryotes, so they do not have a nucleus, and they increased — not decreased — atmospheric oxygen.)