Question

question 13
the concentration of ddt in a certain lake is 0.000003 ppm (parts per million), while the concentration of ddt in the tissues of a nearby osprey (a fish - eating bird) is 25 ppm. this is an example of
biomagnification
biotransformation
bioremediation
biodegradation
bioreduction

Explanation:

• Biomagnification: It is the process where the concentration of a pollutant (like DDT) increases as it moves up the food chain. Here, DDT concentration is low in the lake water (0.000003 ppm) but high in the osprey (25 ppm), which is a fish - eating bird (higher up in the food chain).
• Biotransformation: Refers to the chemical modification of a substance (e.g., by enzymes in an organism), not the increase in concentration up the food chain.
• Bioremediation: Is the use of organisms (usually microbes) to clean up pollutants, which is not relevant here.
• Biodegradation: Is the breakdown of a substance by biological agents (e.g., bacteria breaking down organic matter), not the increase in pollutant concentration.
• Bioinduction: Is the induction of a biological response (e.g., enzyme induction), not related to pollutant concentration increase in a food chain.

Answer:

biomagnification