S3/N5 Food webs

Which of the following is a producer in this food web?

• Oak tree

• Caterpillar

• Thrush

• Hawk

Name an organism that is both predator and prey.

• Caterpillar

• Thrush

• Hawk

• Oak tree

Which of the following is a tertiary consumer?

• Oak tree

• Snail

• Thrush

• Hawk

Which of the following is a herbivore?

• Ladybird

• Shrew

• Greenfly

• Stoat

Which is not a way that energy is lost from a food chain?

• Heat

• Movement

• Undigested materials

• Growth

The number of freshwater shrimps was found to have decreased dramatically in this ecosystem. Predict the effect this will have on the numbers of dragonfly nymphs.

• Increase

• Decrease

• Stay the same

The use of insecticides in a field killed most of the caterpillars and aphids. What is the effect on slugs?

• Increase

• Decrease

• Stay the same

The number of freshwater shrimps was found to have decreased dramatically in this ecosystem.

Predict the effect this will have on the numbers of microscopic algae.

• Increase

• Decrease

• Stay the same

In this ecosystem, what could could be a result of a large decrease in slug numbers?

• An increase in snails

• An increase in hawks

• A decrease in caterpillars

• A decrease in oak trees

The use of insecticides in a field killed most of the caterpillars and aphids. What is the effect on carnivorous insects?

• Increase

• Decrease

• Stay the same