IMG_1163.jpeg

# Ecology - Exam Revision 1. **Write and explain the following equations:** a) **Photosynthesis** b) **Respiration** 2. **Which organisms perform photosynthesis and respiration?** Producers 3. **Explain the nitrogen cycle including:** - Nitrification - Nitrifying bacteria...

# Ecology - Exam Revision 1. **Write and explain the following equations:** a) **Photosynthesis** b) **Respiration** 2. **Which organisms perform photosynthesis and respiration?** Producers 3. **Explain the nitrogen cycle including:** - Nitrification - Nitrifying bacteria - Denitrifying bacteria - Nitrogen fixation - Nitrogen-fixing bacteria 4. **Explain how eutrophication, combustion, and deforestation affect the carbon or nitrogen cycle.** 5. **Define the following terms:** - Producer - Consumer (primary, secondary, tertiary) - Ecosystem - Herbivore - Carnivore - Omnivore - Apex predator - Prey - Predator - Carrying capacity (biotic potential) - Food chain - Food web - Trophic level - Decomposer - Autotroph - Heterotroph - Bioaccumulation (e.g., DDT) - Population - Interspecific competition - Intraspecific competition - Biodiversity - Sustainability - Primary succession - Secondary succession 6. **Know:** - The three types of ecological pyramids (number, mass, energy) and their characteristics. - How much energy is transferred at each level. - What the source of all energy is. 7. **Create a food chain including an eagle, mouse, grass, and snake.** Indicate the producer, herbivore, carnivore, and apex predator. Indicate their trophic level. 8. **Explain which trophic level in a food web has the highest and lowest numbers of organisms. If a group of animals disappears, what would happen to the animals above and below them in the food web?** 9. **Draw a graph illustrating a population that increases rapidly, reaches its carrying capacity (label it), and then stabilizes in a dynamic equilibrium.** 10. **Define and give examples of density-dependent and density-independent factors.**