Pictorial based questions - Trophic level — task. Biology CBSE Live product, Class 10 (2025-26).

Provide a brief answer:

The cartoon below addresses a growing concern:

What impact will the process shown in the image have on Humans if they occupy the last trophic level? Explain.

1. Identify the process depicted in the image and explain its effects on aquatic ecosystems.

Manual irrigation to increase crop yield.
Natural pest control methods.
Spraying of chemicals that contaminate water bodies.
Use of organic fertilizers that enhance biodiversity.

2. How does bioaccumulation and biomagnification affect humans occupying the last trophic level?

Humans excrete all toxins efficiently, so there is no effect.
Toxins decrease as they move up the food chain, reducing health risks.
Toxins increase as they move up the food chain, causing health problems in humans.
Toxins only affect aquatic organisms and do not impact humans.

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7. Pictorial based questions - Trophic level

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