Question

What happens to the concentration of DDT in each trophic level?

• A. Decrease
• B. Increases
• C. Remains unchanged
• D. Becomes zero

Answer 1

Answer:

B. Increases

• Sometimes there is the accumulation of certain pollutants (toxins) in the tissues of organisms whose concentration increases along the food chain; this process of increasing accumulation of toxins is known as bioamplification or biomagnification.

• An example is DDT whose concentration increases at each trophic level.