Answer the following questions about transfer of materials in the ecosystem.

Question

CASE_STUDIESFlow of Energy in EcosystemBiological Magnification2 sub-questions

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The percentage of solar energy which is not converted into food energy by the leaves of green plants in a terrestrial ecosystem is about :

MCQ (Single)Flow of Energy in EcosystemTen Percent Law of Energy Transfer

"Excessive use of chemicals and pesticides in agriculture adversely effect the environment." Justify this statement.

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Biological Magnification

Impact of Human Activities on Environment

Assertion (A) : Accumulation of harmful chemicals is maximum in the organisms at the highest trophic level of a food chain. Reason (R) : Harmful chemicals are sprayed on the crops to protect them from diseases and pests.

Assertion-ReasonBiological Magnification

Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions :

CASE_STUDIESFood Chain in EcosystemTrophic Levels in Food ChainFlow of Energy in Ecosystem

Use of pesticides to protect our crops affect organisms at various trophic levels especially human beings. Name the phenomenon involved and explain how does it happen.

TextBiological Magnification

Assertion (A): The energy which passes to the herbivores does not come back to autotrophs. Reason (R): The flow of energy in a food chain is unidirectional.

Assertion-ReasonFlow of Energy in EcosystemTen Percent Law of Energy Transfer