Q9 Consider the following statements
i) The occurrence of pesticide like DDT in higher trophic level is termed as Bio accumulation.
ii) Persistent pollutants take many years to disappear from the environment.
Which of the above statements is/are correct?
Q9 Consider the following statements
i) The occurrence of pesticide like DDT in higher trophic level is termed as Bio accumulation.
ii) Persistent pollutants take many years to disappear from the environment.
Which of the above statements is/are correct?
The correct option is B b) Only ii
9 Ans.B
Explanation: Bio magnification, also known as bio amplification or biological magnification is the increasing concentration of a substance, such as a toxic chemical, in the tissues of organisms at successively higher levels in a food chain. This increase can occur as a result of:
• Persistence – where the substance cannot be broken down by environmental processes
• Food chain energetics – where the substance's concentration increases progressively as it moves up a food chain
• Low or non-existent rate of internal degradation or excretion of the substance – often due to water-insolubility
b) Only ii
9 Ans.B
Explanation: Bio magnification, also known as bio amplification or biological magnification is the increasing concentration of a substance, such as a toxic chemical, in the tissues of organisms at successively higher levels in a food chain. This increase can occur as a result of:
• Persistence – where the substance cannot be broken down by environmental processes
• Food chain energetics – where the substance's concentration increases progressively as it moves up a food chain
• Low or non-existent rate of internal degradation or excretion of the substance – often due to water-insolubility
