Question

Why blue green algae is placed in monera and not in plantae?

Answer 1

blue green algae is placed in Monera and not in planted because they they were unicellular and most primitive prokaryotes.
2) body cells do not have a defined nucleus.
3)membrane bound cell organelles are absent.
4)mode of nutrition maybe autotrophic or heterotrophic it includes bacteria blue green algae and cyanobacteria and mycoplasmas.