1. What is a food chain?
a) A network of plants and animals
b) A linear sequence of organisms through which energy and nutrients pass
c) A series of consumers in an ecosystem
d) A collection of decomposers
Answer: b) A linear sequence of organisms through which energy and nutrients pass
2. Which of the following is an example of a producer in a food chain?
a) Grasshopper
b) Deer
c) Grass
d) Eagle
Answer: c) Grass
3. Which of these organisms is considered a primary consumer?
a) Cow
b) Rabbit
c) Lion
d) Owl
Answer: b) Rabbit
4. What is the role of decomposers in a food web?
a) To capture sunlight
b) To break down dead organisms
c) To consume herbivores
d) To produce oxygen
Answer: b) To break down dead organisms
5. Which of the following is a characteristic of a food web?
a) Simple and linear
b) Shows multiple interconnected food chains
c) Involves only carnivores
d) Does not include producers
Answer: b) Shows multiple interconnected food chains
6. The transfer of energy in a food chain occurs in which direction?
a) From consumers to producers
b) From producers to consumers
c) In a circular motion
d) In random directions
Answer: b) From producers to consumers
7. Which trophic level in a food chain consumes herbivores?
a) Primary consumers
b) Secondary consumers
c) Tertiary consumers
d) Producers
Answer: b) Secondary consumers
8. A food chain is limited by the number of trophic levels due to:
a) Energy loss at each trophic level
b) The size of the organisms
c) The availability of oxygen
d) The temperature of the environment
Answer: a) Energy loss at each trophic level
9. What is the main difference between a food chain and a food web?
a) A food chain has more consumers
b) A food web consists of multiple interconnected food chains
c) A food web is linear, while a food chain is branched
d) Food chains show energy flow while food webs show nutrient flow
Answer: b) A food web consists of multiple interconnected food chains
10. Which of the following is a secondary consumer?
a) Grass
b) Rabbit
c) Snake
d) Grasshopper
Answer: c) Snake
11. Which organisms are considered tertiary consumers?
a) Primary producers
b) Herbivores
c) Carnivores that eat other carnivores
d) Decomposers
Answer: c) Carnivores that eat other carnivores
12. In a food web, what does the arrow represent?
a) The direction of movement of water
b) The transfer of energy and nutrients
c) The movement of animals
d) The flow of oxygen
Answer: b) The transfer of energy and nutrients
13. Which of the following is a key feature of a food chain?
a) Complex interaction of multiple species
b) One-way flow of energy
c) Involvement of only producers
d) Circular flow of nutrients
Answer: b) One-way flow of energy
14. What would happen if a top predator were removed from a food web?
a) It would have no impact
b) The producer population would increase
c) It could cause a trophic cascade, affecting the entire ecosystem
d) The herbivore population would disappear
Answer: c) It could cause a trophic cascade, affecting the entire ecosystem
15. Which of the following is not a consumer in a food web?
a) Herbivores
b) Carnivores
c) Omnivores
d) Plants
Answer: d) Plants
16. In a food web, which organisms are typically at the top of the trophic levels?
a) Producers
b) Primary consumers
c) Secondary consumers
d) Tertiary consumers
Answer: d) Tertiary consumers
17. Which of the following is an example of a primary producer?
a) Phytoplankton
b) Hawk
c) Rabbit
d) Snake
Answer: a) Phytoplankton
18. Which statement is true about energy flow in a food chain?
a) Energy is recycled in each trophic level
b) Energy is lost at each trophic level, primarily as heat
c) Energy increases as you move up trophic levels
d) Energy flows only from consumers to producers
Answer: b) Energy is lost at each trophic level, primarily as heat
19. Which of the following is a quaternary consumer?
a) Deer
b) Lion
c) Hawk
d) Human
Answer: d) Human
20. Which of the following does not fit into a food chain?
a) Primary producer
b) Decomposer
c) Omnivore
d) Water
Answer: d) Water
21. What happens to the energy as it moves up trophic levels in a food chain?
a) It increases
b) It decreases
c) It remains the same
d) It is stored indefinitely
Answer: b) It decreases
22. What is the role of herbivores in a food web?
a) They break down dead organic matter
b) They produce energy for plants
c) They eat producers and transfer energy to higher trophic levels
d) They are at the top of the food web
Answer: c) They eat producers and transfer energy to higher trophic levels
23. Which is the correct order of a food chain?
a) Herbivore → Carnivore → Producer
b) Producer → Herbivore → Carnivore
c) Carnivore → Herbivore → Producer
d) Decomposer → Herbivore → Carnivore
Answer: b) Producer → Herbivore → Carnivore
24. What is the relationship between food chains and food webs?
a) Food webs are composed of only food chains
b) Food chains and food webs are unrelated
c) Food webs are composed of many interconnected food chains
d) Food webs represent a single linear chain of energy flow
Answer: c) Food webs are composed of many interconnected food chains
25. In an ecosystem, if the number of producers decreases, what is the most likely effect?
a) The primary consumers will thrive
b) Secondary and tertiary consumers will increase
c) All consumers will be affected due to a lack of energy flow
d) There will be no significant effect on the ecosystem
Answer: c) All consumers will be affected due to a lack of energy flow
26. Which is true about decomposers in a food web?
a) They produce their own food through photosynthesis
b) They are not essential to the functioning of the ecosystem
c) They recycle nutrients back into the soil
d) They are usually carnivores
Answer: c) They recycle nutrients back into the soil
27. What is the main function of primary consumers in a food web?
a) To break down dead organisms
b) To consume producers
c) To consume other consumers
d) To produce food through photosynthesis
Answer: b) To consume producers
28. Which of the following organisms would be considered an apex predator in a food web?
a) Fox
b) Eagle
c) Rabbit
d) Grass
Answer: b) Eagle
29. Which statement best describes an omnivore in a food chain?
a) An organism that feeds only on plants
b) An organism that feeds on both plants and animals
c) An organism that feeds only on animals
d) An organism that decomposes dead matter
Answer: b) An organism that feeds on both plants and animals
30. How does the complexity of a food web impact an ecosystem’s stability?
a) A more complex food web increases the stability of the ecosystem
b) A more complex food web decreases the stability of the ecosystem
c) Complexity of the food web does not affect ecosystem stability
d) A simpler food web is always more stable
Answer: a) A more complex food web increases the stability of the ecosystem
