Question

Archea and nitrogen-fixing organisms are classified into which of the following kingdoms?
1. Plantea
2. Animalia
3. Fungi
4. Monera

Answer 1

Correct Answer - Option 4 : Monera

The correct answer is ​Monera.

• Some bacteria and blue-green algae are able to recover nitrogen from the atmosphere to enrich the soil with nitrogen and increase its fertility. 
• These microbes are commonly called biological nitrogen fixers.
• Some members of the Monera kingdom have the capability of fixation of atmospheric nitrogen.
• All prokaryotic organisms are included in the Monera kingdom.
• The creatures of this kingdom are the smallest and simplest.
• For the convenience of study, the kingdom of Monera is divided into four parts-

1. Bacteria
2. Actinomycetes
3. Archaebacteria
4. Cyanobacteria​

•  In the five-kingdom classifications, Monera, Protista, Fungi, Plantae, and Animalia​ are included.
• Monera is unicellular organisms, which are prokaryotic cellular structures.
• The mode of nutrition in monera can be autotrophic or heterotrophic.
• Protista is also a unicellular organism, although possessing eukaryotic cellular organization.