Question

Cyanobacteria were the first organisms to photosynthesize but
they died out before the end of the Precambrian.
True or false

Answer 1

Answer:

true

Explanation:

Answer 2

Cyanobacteria was amongst the first crown Eubacteria to evolve. Also for more than 2.5 billion years they have strongly helped and supported the Earths atmosphere and so the cyanobacteria did not die out before the precambrian.