Question

In which kingdom would you classify the archaea and nitrogen-fixing organism if the five-kingdom system of classification is used?

Answer 1

If whittakers five kingdom classification is used archaea and nitrogen fixing bacteria are grouped together under monera because they are unicellular prokaryotes

Answer 2

Monera

Explanation:

• Wittaker classified the organism into five groups monera, protista, fungi, plantae, and animalia. The kingdom monera contains an organism that lacks nucleus which means prokaryotes are present in monera kingdom.
• Nitrogen-fixing organisms are bacteria which are prokaryotes and archaea are also prokaryotes.  
• So as both are prokaryotes and in monera, prokaryotes are present therefore monera is the kingdom where archaea and nitrogen-fixing organisms should be placed. So the correct answer is monera.

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