Understanding Food Webs and Bioaccumulation

What is a food web?

• A diagram showing the energy flow in a single organism

• A chart of the population sizes of different species

• A network of interconnected food chains in an ecosystem

• A linear sequence of organisms where each is eaten by the next

What might happen if a species is removed from a food web?

• The ecosystem remains unchanged

• The food web becomes more stable

• All other species increase in number

• The interactions between species may change

What is bioaccumulation?

• The process of organisms growing larger over time

• The buildup of chemicals in an organism through the food chain

• The decrease in biodiversity in an ecosystem

• The increase in population size of a species

Which organism in a food chain is most affected by bioaccumulation?

• The top predator

• The secondary consumer

• The primary consumer

• The producer

What was DDT primarily used for?

• Fertilizing crops

• Feeding livestock

• Killing mosquitoes

• Enhancing plant growth

How did DDT affect birds of prey?

• It increased their population

• It had no effect on them

• It caused many to die due to bioaccumulation

• It made them immune to diseases

What is an example of interdependence in a food web?

• A tree growing in a forest

• A rock sitting on a hill

• A bee pollinating a flower

• A river flowing through a valley

How can human activities impact food webs?

• By stabilizing them

• By having no effect

• By making them more complex

• By disrupting the interdependent relationships

Which human activity is NOT mentioned as affecting food webs?

• Building roads

• Increasing pollution

• Planting more trees

• Destroying habitats

Why is it important to consider the impact of human activities on food webs?

• To ensure the survival of all species

• To increase the number of predators

• To decrease the number of producers

• To make ecosystems more complex