Question

(a) Explain biological magnification with the help of an example.

(b) Construct an aquatic food chain showing four trophic levels.​

Answer 1

Answer:

a} Biological magnification refers to the process where toxic substances move up the food chain and become more concentrated at each level. ... An example of biological magnification and its dangers is any small fish that eats plankton that has been tainted with mercury.

b} An aquatic food chain showing four trophic levels is as follows: Phytoplankton \(\to\) Zooplankton \(\to\) Crustacean \(\to\) Fish. (i) Phytoplanktons belong to the \(1^{st}\) trophic level as they are producers which produce their own food.