HORTICULTURE

Detailed explanation-1: -Cyanobacteria refer to a group of gram-negative bacteria that are aquatic and photosynthetic. They are prokaryotic in nature. They do not possess cell organelles and a distinct nucleus. As all the prokaryotes fall under kingdom monera so cyanobacteria are classified under the kingdom monera.

Detailed explanation-2: -Cyanobacteria are classified in the kingdom Monera, phylum Cyanobacteria; are considered to be more closely related to bacteria; and are no longer considered members of the plant family.

Detailed explanation-3: -Blue-green algae or Cyanobacteria are photosynthetic bacteria but they are placed under kingdom Monera because they are unicellular, they show prokaryotic features like lack of a well defined nucleus.

Detailed explanation-4: -Cyanobacteria, formerly known as blue-green algae, are photosynthetic microscopic organisms that are technically bacteria.