Question

In five-kingdom classification system, the kingdom that includes the blue-green algae nitrogen-fixing bacteria and methanogenic archaebacteria is

• A. Plantae
• B. Fungi
• C. Protista
• D. Monera

Answer 1

The correct option is D Monera

Monera includes - Archaebacteria and Eubacteria.

Archaebacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their survival in extreme conditions. eg -Methanogens.

Eubacteria are characterized by the presence of a rigid cell wall, and if motile, a flagellum. The cyanobacteria (blue-green algae) have chlorophyll a similar to green plants and are photosynthetic autotrophs. Heterotrophic bacteria are helpful in making curd from milk, production of antibiotic, fixing nitrogen in legume roots, etc.

So the correct option is "Monera".