Question

Bio-magnification ___________.

• A. means increasing the concentration of various toxic substance along food chain.
• B. means increasing the concentration of various substance along food chain.
• C. means increasing the concentration of various useful substance along food chain.
• D. means decreasing the concentration of various toxic substance along food chain.

Answer 1

The correct option is A means increasing the concentration of various toxic substance along food chain.

Bio-magnification is any concentration of a toxin, such as pesticides, in the tissues of tolerant 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 – mainly due to water-insolubility
• The correct answer is A .