Why is algae in both of the kingdoms? protist and monera?

Question

there is the kindom of protist which says just algae and moneara which say blue-green algae. i dont understand! if any1 knows pls reply!

Answer 1

It's only in Kingdom Protista.

They USED to be classified in the Kingdom Monera because Cyanobacteria share general prokaryotic characteristics (eg, they lack membrane-bound organelles such as a nucleus, chloroplasts and mitochondria) and so are related to BACTERIA; and include unicellular, colonial and filamentous forms.

Answer 2

Algae are classified only under Kingdom Protista as per Whittaker's Five Kingdom system of classification.

Kingdom Monera includes bacteria and other mostly tiny, single-celled organisms whose genetic material is loose in the cell.

Earlier, the organisms in Kingdom Monera were considered blue-green algae (Cyanophyta). They are now considered a group of bacteria, typically called the cyanobacteria and are now known not to be closely related to plants, fungi, or animals.

Answer 3

Algae can be a rather vague term.  Blue-green 'algae' aren't closely related to other algae.  They're simpler.