Bioaccumulation and Environmental Toxins

The video tutorial explores bioaccumulation and biomagnification, explaining how pollutants build up in organisms and ecosystems. It discusses the measurement of pollutants in parts per million and examines the impact of pesticides like DDT, which bioaccumulate and disrupt endocrine systems. The video also covers heavy metals such as mercury and lead, highlighting their presence in ecosystems and potential hazards.

What is bioaccumulation?

• The buildup of chemical substances in the environment

• The increase of chemical concentration in organisms over time

• The process of chemicals being broken down in organisms

• The movement of chemicals through the air

How does biomagnification differ from bioaccumulation?

• It involves the entire ecosystem

• It decreases chemical concentration

• It only affects aquatic life

• It occurs within a single organism

What unit is commonly used to measure pollutants?

• Parts per hundred

• Parts per million

• Parts per thousand

• Parts per billion

Which pesticide is known for bioaccumulating in fatty tissues?

• Diazinon

• DDT

• Glyphosate

• Atrazine

What is an endocrine-disrupting compound (EDC)?

• A compound that enhances hormone production

• A compound that mimics natural hormones

• A compound that breaks down hormones

• A compound that is harmless to wildlife

How does DDT affect birds of prey?

• It weakens their eggshells

• It disrupts their feeding habits

• It increases their population

• It strengthens their eggshells

What is a common source of mercury in ecosystems?

• Agricultural runoff

• Industrial processes

• Household waste

• Forest fires

Which heavy metal was commonly used in paint and plumbing?

• Iron

• Lead

• Zinc

• Copper

What happens to mercury when it is converted by bacteria?

• It becomes methyl mercury

• It dissolves in water

• It turns into a gas

• It becomes less toxic

Why is it important to be cautious with old paint in buildings?

• It is flammable

• It may contain lead

• It can cause allergic reactions

• It may contain asbestos