Food Chain and Population Dynamics

Lesson three covers interactions and interdependence, focusing on sampling techniques using a Tobin funnel and an alternative garden method. It includes identifying organisms with a pictorial key, investigating food chains, understanding predator-prey relationships, and listing limiting factors on populations.

What is the purpose of using a hot lamp in the Algren funnel technique?

• To provide light for the organisms

• To create a warm environment that encourages organisms to move

• To dry the leaf litter

• To sterilize the leaf litter

Which of the following is NOT a requirement for the container used in the Tobin funnel method?

• It must be transparent

• It must be able to hold the organisms

• It must be made of glass

• It must have slippery sides

What should you do if it rains while using the garden method for collecting organisms?

• Cover the container with a lid

• Move the container indoors

• Leave it as it is

• Empty the container immediately

Which of the following organisms is NOT found in the provided table for identification?

• Harvestman

• Centipede

• Wood louse

• Butterfly

In a simple food chain, what role does the leaf litter play?

• Apex predator

• Secondary consumer

• Producer

• Primary consumer

Which organism is considered the apex predator in the example food chain?

• Harvestman

• Earthworm

• Wood louse

• Centipede

Which of the following is a primary consumer in the example food chain?

• Leaf litter

• Harvestman

• Bird

• Wood louse

What happens to the predator population if the prey population increases?

• The predator population becomes extinct

• The predator population increases

• The predator population remains the same

• The predator population decreases

What is a limiting factor in population growth?

• A factor that stabilizes population size

• A factor that has no effect on population size

• A factor that decreases population size

• A factor that increases population size

What is the relationship between predator and prey populations?

• Predator populations decrease as prey populations increase

• They are independent of each other

• Prey populations are unaffected by predator populations

• They are interdependent and cycle up and down