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Question

Biomagnification occurs strongly with substances that are:

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1. **Biological Magnification**: The increase in concentration of a toxic substance (like $DDT$ or mercury) at successive trophic levels.
2. **Requirement for Persistence**: The substance must be **biologically persistent** ($i.e.,$ not easily broken down or metabolized).
3. **Solubility**: It must be **lipophilic** (fat-soluble). This means the substance accumulates in the fatty tissues of organisms rather than being dissolved in water and excreted.
4. **Mechanism**: When a predator eats many prey items, it ingests all the toxins accumulated in those prey, leading to much higher concentrations in the predator's body.

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Pollution

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