Ecosystems and Succession

Organisms that can produce their own source of food are called...

• heterotrophs

• omnivores

• autotrophs

• herbivores

A consumer that eats only plants is called...

• an omnivore

• a carnivore

• an autotroph

• an herbivore

Herbivores are also called...

• secondary consumers

• primary consumers

• producers

• tertiary consumers

Heterotrophs that eat producers and other heterotrophs are called...

• autotrophs

• herbivores

• carnivores

• omnivores

How much energy moves from trophic level to trophic level?

• 100%

• 50%

• 1%

• 10%

Energy enters an ecosystem as...

• chemicals

• food

• minerals

• sunlight

Most of the 90% of the energy that doesn't move on from trophic level to trophic level...

• is absorbed into the soil.

• is used to maintain the metabolism of that particular organism.

• is used to make pretty babies.

• is exerted in arguments with a mate.

The picture shows what type of succession?

• primary
• secondary
• tertiary
• quadanary

What is the name given to lichen or algae after a primary succession?

• pioneer species
• volunteer species
• founder species
• conqueror species

After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?

• lichens → shrubs → soil → trees

• lichens → soil → shrubs→grasses

• soil → trees → shrubs → lichens

• lichens → grasses → shrubs → trees