Class 11 · Biological Classification

Characteristics and Distribution of Bacteria — NEET Biology

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📖 NCERT Source

Bacteria are the sole members of the Kingdom Monera. They are the most abundant micro-organisms. Bacteria occur almost everywhere. Hundreds of bacteria are present in a handful of soil. They also live in extreme habitats such as hot springs, deserts, snow and deep oceans where very few other life forms can survive. Many of them live in or on other organisms as parasites.

NCERT Biology · Class 11 · Chapter 2 · Paragraph 8
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Assertion (A): Bacteria are the sole members of the Kingdom Monera. Reason (R): Bacteria are the most abundant micro-organisms in nature.

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Correct answer: B If both assertion and reason are true but reason is not the correct explanation of the assertion.

Both statements are true from NCERT. NCERT states “Bacteria are the sole members of the Kingdom Monera” (Assertion true) and “They are the most abundant micro-organisms” (Reason true). However, the Reason doesn’t explain WHY bacteria are the sole members of Monera - it provides information about their abundance, which is a separate ecological fact. Both are true but the relationship is not explanatory.

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What does NCERT say about Bacteria are sole members?
Bacteria are the sole members of the Kingdom Monera. They are the most abundant micro-organisms.
Has this concept appeared in NEET?
Practice this NCERT concept with questions on MedicNEET.
Which chapter is this from?
Biological Classification, Class 11 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

176/180
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.

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