Question

Maximum diversity is seen amongst
A) Monera
B) Animalia
C) Plantae
D) Protista

Answer 1

Hint: The biological kingdom that is made up of prokaryotes (particularly bacteria). As such, it is composed of single-celled organisms that lack a true nucleus.

 Complete answer: R.H. Whittaker (1969), an American ecologist advocated a five-kingdom system of classification in which the whole living world has been classified: Monera, Protista, Fungi, Animalia, Plantae
 Monerans (Gk. Monos = single) is the simplest unicellular and prokaryotic organisms. The cell wall is present in some organisms and absent in others. The bacterial cell wall is not made up of cellulose as in case of plant cells. Monerans lacks a well-defined nucleus and cell organelles. Some Monerans can synthesise their food. They may be photoautotrophs or chemo-autotrophs. Some of them have heterotrophic mode of nutrition and may be parasitic, saprozoic or symbiotic (Mycoplasma and other bacteria). Examples: bacteria, mycoplasma and blue-green algae. Kingdom Monera has been divided into two domains i.e. Archaea and bacteria and most of the bacteria were classified under the kingdom Monera so that’s why the kingdom is considered to be more diverse than any other kingdom i.e. Animalia, Plantae, Protista.
Kingdom Animalia includes multicellular and non-green eukaryotes. Examples: all animals. Kingdom Animalia does not contain prokaryotes as compared to kingdom Monera. So, Animalia is less diverse. Kingdom Plantae includes multicellular and green eukaryotes but according to the studies, prokaryotic organisms are more in number compared with eukaryotes. That’s why kingdom Plantae is less diverse than Monera. Example: All green photosynthetic plants. Kingdom Protista is simple unicellular eukaryotic organisms. Similarly, Protista does not contain prokaryotic organisms so that’s why this is less diverse. Example: paramecium, amoeba, diatoms.
Thus, the correct answer is option A. i.e., Monera

Thus, the correct answer is option A. i.e., Monera.

Note: Diversity of micro-organisms is influenced by the features of the land, water bodies, climate, pollution and human interference, it is estimated that there are about 10 million species on the earth through the presently known number of living species is 1.7-1.8 million.