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(a) Improper waste disposal is a curse to the environment. Explain.
(b) Why are crop fields considered as artificial ecosystems?
(c) 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.
(b) Why are crop fields considered as artificial ecosystems?
(c) 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.
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(a) When waste is not segregated at source, it gets accumulated and materials like plastic will not be biodegraded. It may clog drains, pollute rivers and oceans and cause harm to cattle, fishes etc. (1)
(Or any other)
(b) Because crop fields are manmade ecosystem and in this living organisms interact with each other and also with the abiotic components of the ecosystem. (1)
(c) These chemicals are non-biodegradable, hence keep getting accumulated at each trophic level, increasing progressively. As human beings occupy the top level in a food chain, the maximum concentration of these chemicals get accumulated in them. (½)
Phenomena is Biological magnification. (½)
(Or any other)
(b) Because crop fields are manmade ecosystem and in this living organisms interact with each other and also with the abiotic components of the ecosystem. (1)
(c) These chemicals are non-biodegradable, hence keep getting accumulated at each trophic level, increasing progressively. As human beings occupy the top level in a food chain, the maximum concentration of these chemicals get accumulated in them. (½)
Phenomena is Biological magnification. (½)