Biology Practice: Ecosystems (Mock Test 4 - Expert/Experimental)
1. In an experimental pond, a researcher removes all the 'Decomposers'. What is the most likely long-term effect on the 'Producers'?
2. A scientist finds that a top predator in a forest has high concentrations of a pesticide in its body, despite the pesticide only being sprayed on the grass. This is an experimental proof of:
3. If the total energy at the Producer level is $10,000\text{ J}$, according to Lindeman's Law, how much energy will be available to the Tertiary Consumer?
4. Why is a 'Food Web' considered more stable and realistic than a 'Food Chain' for a natural ecosystem?
5. In a 'Pyramid of Numbers' for a single large Oak Tree supporting hundreds of herbivorous insects, the shape of the pyramid will be:
6. A lake ecosystem shows 'Algal Bloom' after heavy rain from nearby farms. The experimental cause is likely:
7. Leguminous plants like peas have Rhizobium bacteria in their root nodules. In a lab, if these nodules are destroyed, the plant will suffer from:
8. Which of the following is a 'Non-Biodegradable' pollutant that poses the greatest risk to a food web?
9. In the 'Carbon Cycle', the process that serves as the ONLY major way to remove $CO_{2}$ from the atmosphere is:
10. An aquarium is a balanced artificial ecosystem. If we add too many fish but no new plants, the 'limiting factor' will become:
11. The bacteria 'Pseudomonas' helps in returning Nitrogen to the air. This experimental step is:
12. Why does the 'Pyramid of Energy' NEVER get inverted?
13. In a study of 'Commensalism', a Remora fish attaches to a Shark. Who benefits and who is unaffected?
14. What is the role of 'Nitrifying Bacteria' (Nitrosomonas) in the Nitrogen cycle?
15. A 'Climax Community' in ecological succession is one that is:
16. 'Inter-specific' competition occurs between:
17. Which of the following accurately describes the 'A biotic' part of the Nitrogen Cycle?
18. If we introduce a 'Foreign/Invasive' species into a balanced ecosystem, the primary threat is:
19. In the Oxygen Cycle, oxygen is primarily replenished by ________ and consumed by ________.
20. 'Greenhouse Effect' in an ecosystem is intensified by the excessive release of:
