Ecosystem - Food Chains, Food Webs, Ecological Pyramids

Grade 12 Biology — Ecosystem - Food Chains, Food Webs, Ecological Pyramids: 25 practice questions with instant scoring and explanations.

1. What is a food chain?
2. What is a food web?
3. What is the advantage of a food web over a food chain?
4. What is a trophic level?
5. How many organisms typically occupy each trophic level?
6. What is an ecological pyramid?
7. What is a pyramid of numbers?
8. What is a pyramid of biomass?
9. What is a pyramid of energy?
10. Why is a pyramid of energy always upright?
11. What is an inverted pyramid of numbers?
12. What determines the shape of a pyramid of biomass?
13. What is bioaccumulation?
14. What is biomagnification?
15. Why are top predators most affected by biomagnification?
16. What is the relationship between food webs and ecosystem stability?
17. How does the removal of a producer affect the entire food web?
18. What is a keystone species?
19. What is the effect of removing an apex predator from a food web?
20. How is a pyramid of biomass different from a pyramid of numbers?
21. Why might a food chain have more than 4 trophic levels?
22. What is the significance of understanding food webs in conservation?
23. How do detritivores differ from decomposers in food chains?
24. What is the difference between autotrophs and heterotrophs in a food chain?
25. How can an organism occupy different trophic levels in different food chains?