6.4b Pollution in the Food Chain

It improves water quality

It has no effect on water quality

It causes contamination of drinking water

It makes water safe for consumption

They break down easily in the environment

They take a long time to break down

They are beneficial for the environment

They are found only in water

mercury levels are elevated by the presence of shorebirds

mercury concentrations increase at higher trophic levels

Lethal Dose 50

Low Dose 50

Lethal Drug 50

Low Drug 50

To determine the effect of a chemical on a living organism

To test the effectiveness of a new drug

To measure the population of an organism

To analyze the genetic makeup of an organism