GRADE 8 BIOLOGY REVISION QUIZ 4 - 2025 CDOWN

Which statement about this food web is correct?

• Eagles obtain their energy from foxes.

• If the hummingbirds all die, the caterpillars will have more food.

• Part of this food web is the food chain: nectar → caterpillar → small birds

• The small birds are carnivores.

In a food web, beetles are:

• carnivores

• decomposers

• herbivores

• producers

If the population of insects decreases, which other population will decrease the most?

• badgers

• lizards

• sagebrush

• squirrels

Which is a primary consumer?

• beetle

• carnivorous bird

• insectivorous mammal

• nectar-feeding insect

Which type of organism depends directly on light energy for its nutrition?

• carnivore

• decomposer

• herbivore

• producer

Which organisms always obtain their energy from dead organic matter?

• consumers

• decomposers

• fungi

• producers

What eventually happens to all the energy in an ecosystem?

• It is lost from the system as heat.

• It is recycled by decomposers.

• It is used by the producers.

• It is used by the top carnivore.

In the food chain “Phytoplankton → Zooplankton → Herring → Salmon”, the zooplankton are:

• primary producers

• primary consumers

• secondary consumers

• tertiary consumers

If additional wrens are introduced into an ecosystem, there will most likely be an immediate decrease in the:

• frog population

• snake population

• falcon population

• grasshopper population

We get energy from the food we eat. The energy in the food first comes from the:

• soil

• fertilizers used by farmers

• sun

• vitamins added by food manufacturers