Ecology - Extra credit Quiz

Which is a true statement about decomposers?

• They obtain energy only from tertiary consumers.

• They are primarily producers.

• They obtain energy from producers and consumers.

• They obtain energy directly from the sun.

Which is a correctly drawn food chain?

• primary producer <-- primary consumer <-- secondary consumer

• primary producer <-- primary consumer --> secondary consumer

• Sun --> primary producer --> primary consumer

• tertiary consumer --> decomposer --> secondary consumer

If the total energy available in the PRODUCER trophic level is 25,000 kcal, how much energy is available for the PRIMARY CONSUMERS?

• 2500 kcal

• 250,000 kcal

• 250 kcal

• 22,500 kcal

Which type of graph is represented in the picture?

• exponential growth

• density dependent graph

• logistic growth

• predator-prey graph

Which of the following best describes a density-independent factor?

• natural disaster

• predation

• competition for food

• parasitism

A new predator has moved into an ecosystem and shares the same habitat and food resource as the predator population that was already there. What is the most likely result that is predicted by the competitive exclusion principle?

• Only one predator population can survive.

• Both populations will die from lack of food.

• Both populations will share a habitat but compete for food.

• The new predator will survive.

Which of the following is a BIOTIC factor?

• rainfall amount

• atmospheric temperature

• bacteria

• soil pH level

Which of the following is an ABIOTIC factor?

• air pressure

• fungus

• protist

• plant

The secondary consumer trophic level has a total of 5,000 kcal of available energy. How much total energy is in the primary consumer level?

• 50,000 kcal

• 500,000 kcal

• 5 kcal

• 500 kcal

Which type of organism can obtain energy directly from any of the other organisms in an ecosystem?

• herbivore

• decomposer

• producer

• carnivore