Ecology Quiz

phytoplankton is

• an animal

• tiny floating algae

• a flower

• bacteria

Food web is

• the network of feeding interactions, through which both energy and matter move

• a series of organisms in which energy is transferred from one organism to another

• composed of one organism only

• a series of organisms in which energy is not being transferred at all

Decomposition releases matter in the form of nutrients that can be used by

• primary producers

• primary consumers

• omnivores

• carnivores

The food web includes all food chains in an ecosystem.

• statement is true

• statement is false

• the food web is small

• the food chain is bigger than the food web

Trophic level is the name of the

• steps of the food chain or web

• steps of the escalator

• steps of the house

• none of the above

The model that shows the relative amount of energy or matter within each trophic level in a food chain or web is called

• ecological pyramid

• ecosystem model

• nutrient cycle

• trophic level

Pyramids of energy show the relative amount of available at each trophic level of a food chain or web.

• fuel

• vitamins

• energy

• organisms

Organisms use much of the energy they acquire on life processes but leave an average of --------- in one trophic level.

• 100%

• 10%

• 60%

• 20%

The pyramid of biomass is

• the model that shows the relative number of individual organisms at each trophic level in an ecosystem

• the model that illustrates the relative amount of living organic matter in each trophic level of an ecosystem

• the model that shows the relative amount of energy or matter within each trophic level in a food chain or web

• one of the pyramids in Egypt

The model that shows the relative number of individual organisms at each trophic level in an ecosystem is called

• pyramid of energy

• weight

• pyramid of biomass

• pyramid of numbers