Energy flow in ecosystem MCQ Questions and Answers:
1. What is energy flow of an ecosystem_______
A. The process by which solar energy is fixed by green plants
B. The process of energy metabolism of organisms in the system
C. The energy transfer process accompanying the circulation of matter in the system
D. The process by which energy enters the environment from an organism
Answer: C
2. In an ecosystem, all consumers have more energy than all producers_______
A. more
B. less
C. equal
D. about equal
Answer: B
3. Which statement about the characteristics of energy flow in an ecosystem is correct?
A. circulating flow
B. step by step
C. One-way flow, gradually decreasing
D. Transfer efficiency is 50%
Answer: C
4. Which energy controls the ecosystem?
A. Water
B. Sun
C. Plants
D. Animals
Answer: B
5. Assuming that the total energy of an ecosystem is 100%, and according to the transfer efficiency of 10%, the energy obtained by the fourth trophic level is_______
A. 0.1%
B. 1%
C. 10%
D. 0.01%
Answer: A
6. Energy flows through the various trophic levels of the ecosystem as______
A. Cyclic, progressively decreasing
B. Cyclic, progressively increasing
C. Non-cyclic, progressively decreasing
D. non-cyclic, incremental
Answer: C
7. What is the flow of energy in an ecosystem?
A. Multidirectional
B. Bidirectional
C. No direction
D. Unidirectional
Answer: D
8. How sunlight is much is reflected back out of the total sunlight reaching Earth?
A. 100%
B. 50%
C. 34%
D. 10%
Answer: C
9. In the energy flow of the ecosystem, the order of energy form transformation is________
A. Light energy → chemical energy → thermal energy
B. heat energy → light energy → chemical energy
C. chemical energy → light energy → thermal energy
D. light energy → heat energy → chemical energy
Answer: A
10. Why energy flow is linear in an ecosystem?
A. Because it flows in air medium
B. Because it is very particular
C. Because ecosystem is linear
D. Because energy flows from one trophic level to the next higher one
Answer: D
11. People use energy pyramids to illustrate the________
A. The relationship between energy and trophic level
A. The relationship between energy and body size
C. The relationship between energy and the number of individuals
D. The relationship between energy and biological metabolism types
Answer: A
12. The main purpose of studying energy flow in ecosystems is to_______
A. Familiarize yourself with the nutritional structure of ecosystems
B. Investigate the direction of energy flow
C. To study the efficiency of energy flow
D. directing as much energy as possible to the part that is most beneficial to human beings
Answer: D
13. Which statement about the amount of assimilation in living things is correct is_________
A. The total energy stored in the trophic grade
B. Total energy in feces after digestion of food
C. Energy intake from the previous trophic level
D. Energy in organic compounds synthesized after absorption
Answer: D
14. In a food chain composed of grass, rabbits and foxes, the energy obtained by the assimilation of rabbits should not include_______
A. Energy released by rabbit respiration
B. into the decomposer's body through the feces of the rabbit
C. Rabbit's own growth and development
D. into the body of the fox
Answer: B
15. The total energy flowing through an ecosystem is____________
A. The total amount of solar energy that hits the ecosystem
B. The total amount of solar energy that strikes all plants in the ecosystem
C. The total solar energy fixed by the producers of the ecosystem
D. Total solar energy passed from producer to consumer
Answer: C
16. Which of the following food chains, assuming that primary consumers receive the same amount of energy from producers, the one that provides the most energy to owls is________
A. Green plants → grasshoppers → spiders → lizards → snakes → owls
B. Green plants → rats → snakes → owls
C. Green plants → grasshoppers → frogs → snakes → owls
D. green plant → rat → owl
Answer: D
17. The role of decomposers in the flow of energy in ecosystems is________
A. Convert light energy into chemical energy
B. Reduce the loss of energy in the step-by-step flow
C. Promote the flow of energy from the previous trophic level to the next trophic level
D. release chemical energy from organic substances into the inorganic environment
Answer: D
18. Statements about food chains and energy flow in ecosystems are incorrect________
A. The more primary consumers, the less energy the secondary consumers get
B. The longer the food chain, the less energy is obtained at the highest trophic level
C. The flow of energy along the food chain is unidirectional
D. The more species of organisms, the more food chains in the ecosystem
Answer: A