Ecosystem and biomagnification

Question 1

Improper waste disposal is a curse to the environment. Explain.

Accepted Answer

Non-biodegradable wastes persist in the environment, cause soil and water pollution, release toxic fumes when burnt, block drainage systems, and harm wildlife/human health.

Question 2

Why are crop fields considered as artificial ecosystems?

Accepted Answer

Crop fields are man-made and maintained by human intervention (irrigation, fertilizers, weeding) rather than developing naturally. They lack self-sustainability.

Question 3

Farmers are using pesticides on the crop plants, but the chances of accumulation of harmful chemicals is greatest in human beings. Why? Name the phenomenon.

Accepted Answer

Phenomenon: **Biological Magnification (Biomagnification)**. Reason: Humans occupy the topmost trophic level in many food chains. Non-biodegradable pesticides accumulate progressively at each successive trophic level, resulting in maximum concentration in humans.

Ecosystem and biomagnification

Passage / data set

Question 1 of 3

Explanation

Question 2 of 3

Explanation

Question 3 of 3

Explanation

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