Explain Kingdom Monera.✌
Answers
♦️Kingdom Monera♦️
▶️ Monera is derived from the Greek word Moneras , which means single.
▶️ As the name suggests,the kingdom has in it all single-celled organisms.
▶️ Kingdom Monera is classified into three sub-kingdoms
●Archaebacteria
●Eubacteria
&
●Cyanobacteria
▶️ The kingdom belongs to a prokaryotic family.
▶️ The organisms belonging to this kingdom do not contain a true nucleus.
Characteristics
▶️ They contain 70S ribosomes.
▶️ The DNA is naked and is not bound by a nuclear membrane.
▶️ It lacks organelles like mitochondria, lysosomes, plastids, Golgi bodies, endoplasmic reticulum, centrosome, etc.
▶️ They reproduce asexually by binary fission or budding.
▶️ These are environmental decomposers and mineralizers.
♦️Archaebacteria♦️
▶️ These are the most ancient bacteria found.
▶️ The structure of the cell wall is different from that of the other bacteria which helps them survive in extreme conditions.
♦️Eubacteria♦️
▶️ Eubacteria are also known as “true bacteria”.
▶️ It moves with the help of flagella.
♦️Cyanobacteria♦️
▶️ These are also known as blue-green algae.
▶️ They are found in the aquatic region.
▶️ These bacteria are photosynthetic in nature.
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The taxon Monera was first proposed as a phylum by Ernst Haeckel in 1866. Subsequently, the phylum was elevated to the rank of kingdom in 1925 by Édouard Chatton. The last commonly accepted mega-classification with the taxon Monera was the five-kingdom classification system established by Robert Whittaker in 1969.
Under the three-domain system of taxonomy, introduced by Carl Woese in 1977, which reflects the evolutionary history of life, the organisms found in kingdom Monera have been divided into two domains, Archaea and Bacteria (with Eukarya as the third domain). Furthermore, the taxon Monera is paraphyletic (does not include all descendants of their most-recent common ancestor), as Archaea and Eukarya are currently believed to be more closely related than either is to Bacteria. The term "moneran" is the informal name of members of this group and is still sometimes used (as is the term "prokaryote") to denote a member of either domain.[1]
Most bacteria were classified under Monera; however, some Cyanobacteria (often called the blue-green algae) were initially classified under Plantae due to their ability to photosynthesize