Question

Blue green algae belongs to the kingdom
A. protista
B. monera
C. Animalia
D. None of these

Answer 1

They generally look green and when scums are dying sometimes may turn bluish. They are actually types of bacteria known as Cyanobacteria and it belongs to the kingdom Monera. Taste and odour problems occur with large concentrations of blue-green algae and some species are producing toxins.

Complete step by step answer: Monera means single. It is a kingdom that contains unicellular organisms with a prokaryotic cell (undeveloped cell)organization like bacteria.
Cell wall of monera is made up of protein plus polysaccharide compounds (peptidoglycan), but not cellulose.
They reproduce asexually by binary fission.
They contain 70s ribosomes
They show nutrition like autotrophic, parasitic, heterotrophic, or saprophytic.
DNA of monera is not enclosed within the nucleus.
They lack organelles like mitochondria, lysosomes, plastids, Golgi bodies, endoplasmic reticulum, centrosome, etc.
Monera is divided into two major groups
(i)Archaebacteria
(ii) Eubacteria
some examples of Monera - Archaea and Bacteria.
Bacteria are found everywhere and are the most numerous organisms on Earth
As we know Blue-green algae is a cyanobacteria hence it belongs to the kingdom Monera
So option B is correct.

Note: Protists:-All eukaryotic cell which is not an animal, plant and fungi. It consists of both single-celled and multicellular organisms. They are a group of eukaryotic single-celled organisms. Kingdom it is classified into Protozoa, Chrysophytes, Euglenoids,Like plasmodium vivax(pathogen for malaria) .
Animalia- These organisms are multicellular, they are eukaryotic and heterotrophic organisms .They lack chlorophyll and cell(present in plant cell). It is also called metazoa. Some phylum like chordata,mollusca etc