1. Ecology Practice Test

2. 1. What chemical reaction releases the free energy of organic compounds for use by organisms? • Photosynthesis • Protein synthesis • Chemosynthesis • Cell respiration • Nitrification

3. 2. Which of these is a type of primary consumer in an ecosystem? • Carnivore • Decomposer • Herbivore • Omnivore • Producer

4. 3. Which kingdoms have members who are decomposers? Choose all that apply. • Monera • Protista • Fungi • Animalia • Plantae

5. 4. Which population dynamic will most likely lead to extinction? • Predator-prey cycle • Logistic growth • Population crash • Exponential growth

6. 5. All organisms contribute to the carbon cycle through the process of ___. • Protein synthesis • Cell respiration • Photosynthesis • Nitrification • Chemosynthesis

7. 6. After an organism dies, nitrogen is returned to the soil in the form of ___. • Nitrogen gas • carbon dioxide • proteins • Ammonia • nitrates

8. 7. Which one of these is a greenhouse gas? Choose all that apply. • Oxygen • Nitrogen • Water vapor • Carbon • Carbon dioxide

9. 8. If an energy pyramid has a total of 500,000 calories at its base, how many calories are transferred to its TERTIARY consumers? • 5000 • 500 • 12,500 • 25,000 • 2500

10. 9. Which process returns nitrogen back into the soil when organisms die? • Photosynthesis • Chemosynthesis • Protein synthesis • Cell respiration • Decomposition

11. 10. Explain how producers & decomposers together contribute to the continuation of life.