Biology Biological Classification Introduction and Kingdom–Monera Single Correct MCQ
Published on: August 13, 2026

Richest source of bacteria is : -

A
Air
B
Soil
C
Water
D
Milk

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Text Solution

Verified by Experts
The correct answer is:
B

Soil: A single gram of soil can contain 1 to 10 billion bacterial cells, making it one of the most concentrated habitats for bacteria.

Air: Bacteria are present in the air, but the concentration is relatively low.

Water: Bacteria are present in water, but typically in lower concentrations than in soil.

Milk: While milk can contain bacteria and act as a growth medium, it is not considered the "richest" source compared to soil.

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