Biomagnification and DDT Quiz

What is the main reason for the accumulation of harmful amounts of DDT in the carnivores?

• DDT is water soluble and easily excreted from the body

• DDT is not absorbed by living organisms

• DDT is fat soluble and easily stored in living tissues

• DDT is quickly degraded in the environment

What is the term used to describe the increase in concentration of DDT along a food chain?

• Bioaccumulation

• Biodegradation

• Biomagnification

• Persistent

What is the evolutionary advantage gained by insects with genetic mutations that made them resistant to DDT?

• They became larger in size

• They became more colorful

• They were not killed by the pesticide

• They reproduced at a faster rate

What is the drawback of DDT in terms of its impact on beneficial insects?

• It indiscriminately killed beneficial insects along with pests

• It only targeted pests and had no impact on beneficial insects

• It made beneficial insects more resistant to other pesticides

• It had no impact on the population of beneficial insects

What is the main reason for the restriction of DDT usage since 1972? (Select two answers)

• Its negative ecological effects

• Its ineffectiveness against pests

• Its high cost

• Its popularity among farmers

What was the main benefit of DDT in preventing millions of deaths from malaria?

• Improving the healthcare infrastructure in affected areas

• Increasing the resistance of humans to malaria

• Significantly reducing the numbers of the mosquito population

• Developing a vaccine for malaria

What is the main reason for the toxic concentration of DDT in organisms at the top of the food chain?

• Bioaccumulation

• Bioremediation

• Biomagnification

• Biodegradation

What is the term used to describe the process of random genetic mutations leading to insects becoming resistant to DDT?

• Artificial selection

• Selective breeding

• Natural selection

• Genetic engineering

What is the main reason for the ineffectiveness of DDT against insects over time?

• The development of new and improved insecticides

• The decrease in the use of DDT

• The change in climate and environmental conditions

• The increase in number of DDT-resistant insects

What was the main benefit of DDT in preventing millions of deaths from malaria?

• Increasing the resistance of humans to malaria

• Significantly reducing the numbers of the mosquito population

• Developing a vaccine for malaria

• Improving the healthcare infrastructure in affected areas