Understanding DDT and Biomagnification

The video discusses the historical use of DDT as a pesticide and its environmental impact, particularly on bald eagles. It introduces the concept of biomagnification, explaining how toxins like DDT and mercury become concentrated in organisms higher up the food chain. The video emphasizes the need for new solutions to manage chemical toxins and highlights ecological careers focused on conservation and awareness.

Which song mentioned in the video references DDT?

• Imagine by John Lennon

• Big Yellow Taxi by Joni Mitchell

• Hotel California by Eagles

• Bohemian Rhapsody by Queen

What was the primary use of DDT when it was first introduced?

• As a food preservative

• As a chemical pesticide

• As a fertilizer

• As a cleaning agent

Why was DDT banned in the United States?

• It was too expensive

• It was replaced by a better pesticide

• It caused negative environmental effects

• It was ineffective against pests

What is biomagnification?

• The increase in population of a species

• The spread of diseases among animals

• The concentration of toxins increasing up the food chain

• The process of organisms growing larger

Which of the following is an example of a toxin that can be biomagnified?

• Water

• Oxygen

• Carbon dioxide

• Mercury

Why do secondary consumers have higher toxin concentrations than primary consumers?

• They are more active

• They are larger in size

• They consume more biomass from the level below

• They live longer

What happens to the toxin concentration as you move up the food chain?

• It decreases

• It increases

• It remains the same

• It disappears

What is a potential solution mentioned for reducing the use of chemical toxins?

• Ignoring the problem

• Increasing the use of DDT

• Developing viruses to target specific pests

• Using more pesticides

What additional problems do animals face besides chemical toxins?

• Habitat destruction

• Overpopulation

• Lack of food

• Too much water

Who plays a crucial role in raising awareness about environmental issues?

• Politicians

• Athletes

• Ecologists

• Celebrities