Question
What is the unit of Bio-concentration?
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
$\text{L/kg}$
Bio-concentration Unit Explained
Bio-concentration measures how a substance accumulates in an organism from its environment. It relates the concentration within the organism to the concentration outside.
Identifying the Correct Bio-concentration Unit
The unit for bio-concentration reflects the ratio of the substance's amount to the organism's mass or volume. Let's examine the options:
- L/kg: This unit signifies Liters (volume of the substance) per kilogram (mass of the organism). It directly indicates how much volume of a substance is concentrated within a unit mass of the organism's tissue. This is a standard way to express bio-concentration.
- ppm (parts per million): While a common concentration unit, ppm is typically a dimensionless ratio (e.g., mass/mass or volume/volume) and doesn't specifically represent volume per mass of the organism.
- ml/m3: This represents volume per volume, but the specific units (milliliters and cubic meters) are not standard for bio-concentration.
- L/cm: This represents volume per length, which is not a relevant measure for concentration within an organism's biomass.
Therefore, the unit L/kg accurately represents bio-concentration.
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