Biology Practice: Ecosystems (Mock Test 5 - Ultimate Comprehensive)
1. The '10 Percent Law' explains that only 10% of the energy is transferred to the next trophic level. What happens to the remaining 90%?
2. Which of the following is a 'Biotic' factor that can limit the population of herbivores in a grassland?
3. In a 'Symbiotic' relationship between an Orchid and a Mango tree, where the orchid gets support but the tree is unaffected, the interaction is:
4. The conversion of Ammonia into Nitrites and then into Nitrates by bacteria is called:
5. Why are 'Decomposers' often called the 'Cleaners of the Environment'?
6. A 'Pyramid of Biomass' in an aquatic ecosystem (like the ocean) is often ________ because the mass of producers is less than consumers at any given time.
7. Which process in the Carbon Cycle is responsible for releasing Carbon back into the atmosphere from fossil fuels?
8. Organisms like Ticks, Lice, and Cuscuta that derive nutrition from a living host are:
9. In the Nitrogen Cycle, lightning plays a role in:
10. A complex network of many food chains that shows the true feeding relationships in a community is a:
11. The 'Apex' of an ecological pyramid of numbers usually represents:
12. Greenhouse gases like $CO_{2}$ and $CH_{4}$ contribute to 'Global Warming' by:
13. Which organism is a 'Primary Consumer' in a pond ecosystem?
14. 'Biomagnification' of DDT in a food chain is most harmful to:
15. The 'Niche' of an organism includes:
16. Nitrogen-fixing bacteria in the root nodules of leguminous plants provide ________ to the plant.
17. In the Oxygen Cycle, 'Photolysis' refers to the splitting of ________ molecules by sunlight to release oxygen.
18. 'Eutrophication' leads to the death of fish mainly because of:
19. An example of a 'Detritus Food Chain' starts with:
20. Which of the following is the 'Master Source' of all abiotic and biotic energy on Earth?