Name: Assessing International Actions Against Global Warming
Uploaded: 2019-07-19
Duration: 6 min 4 s
Description: Global warming is creating a long-term change in the earth's temperature. Many treaties were implemented to control this. Watch this video to know how much efforts are effective

Question

Discuss biomagnification.

Accepted Answer

Biomagnification means gathering various unimportant and at times harmful substances by organisms at different levels of a food chain. It occurs when industrial, agricultural, and human wastes are dumped into the oceans via rivers, sewers, streams, etc. Most of this waste is toxic and dangerous and deposited on the sea bed. The bottom feeders of a food chain consume these and gradually it is carried to the top of that particular food chain. The concentration of toxic materials increases with every step up on a food chain. Ultimately, it affects humans as they sit on top of most of the food chains.

An example of biological magnification is the presence of heavy metals in various predatory fishes. Fishes like swordfish, shark, tuna, orange roughy, king mackerel, etc. contain a higher level of toxic mercury than smaller fishes.

Embibe Experts Solutions for Exercise 1: Haryana Board-2018

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