According to the three-domain system, how many domains do organisms from the Kingdom Monera belong to?a)Oneb)Twoc)Threed)FourCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Understanding the Three-Domain System
The three-domain system, proposed by Carl Woese, classifies all living organisms into three primary domains: Archaea, Bacteria, and Eukarya. This classification is based on genetic and biochemical differences.

Organisms in the Kingdom Monera
The Kingdom Monera historically included all prokaryotic organisms, which are unicellular and lack a membrane-bound nucleus. In the context of the three-domain system, Monera is divided into two distinct domains:

Bacteria: This domain includes common bacteria, characterized by peptidoglycan in their cell walls. They play essential roles in various ecosystems, including decomposition and nutrient cycling.
Archaea: This domain includes extremophiles, such as methanogens and halophiles, which can survive in extreme environmental conditions. Their cell membranes and biochemistry differ significantly from those of bacteria.

Conclusion
Thus, organisms from the Kingdom Monera belong to two domains: Bacteria and Archaea. The classification emphasizes the fundamental differences between these groups, leading to the conclusion that the correct answer is option 'B'—two domains.

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

Topic-wise MCQ Tests for NEET

NEET Mock Test Series - Updated 2026 Pattern

Physics Class 11

Top Courses for NEET

Top Courses for NEET

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company