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 decreased the levels of oxygen in the atmosphere
Cyanobacteria decreased the levels of oxygen in the atmosphere

Cyanobacteria were the first photosynthesizing organisms
Cyanobacteria were the first photosynthesizing organisms

Cyanobacteria lived in the ocean

Answer 1

Select the correct answer from the list.(1 point)
Increased levels of oxygen in the atmosphere due to photosynthesis caused rates of weathering to (remain constant / increase / decrease), which aided in the formation of (soil / chloroplasts / roots).

Answer 2

Cyanobacteria were the first photosynthesizing organisms
Cyanobacteria lived in the ocean