What were the earliest...?

1 ⤊

14.Which were the earliest oxygen-producing life-forms?
A.
dinosaurs

B.
ferns

C.
seaweeds

D.
cyanobacteria

2006-12-30 15:24:20 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Botany

cyanobacteria

2006-12-30 15:26:43 · answer #1 · answered by ivorytowerboy 5 · 1⤊ 0⤋

2006-12-30 15:45:10 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋

option E. me!!!!!!!!!!!!
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just joking. its D. cyanobacteria

2006-12-30 15:33:23 · answer #3 · answered by guyfromthesky 2 · 0⤊ 0⤋