University:
Acadia University
Course:
BIOL 2663 | Marine Biology
Academic year:

2024
Views:

310

Pages:

3
Author:

Nabila N.

Quiz on Food chains and food webs 1. What is the primary role of producers in a food chain? A. They decompose organic matter . B. They produce energy from sunlight. C. They consume primary consumers. D. They are the last link in the food chain. Answer: They produce energy from sunlight. (B) Producers utilize energy from the sun to produce their own food through photosynthesis. 2. Which of the following descriptions best characterizes a food web? A. A simpliﬁed version of food chains in an ecosystem. B. A direct linear sequence of energy ﬂow. C. A complex network of interconnected food chains. D. A diagram showing only herbivores in an ecosystem. Answer: A complex network of interconnected food chains. (C) Food webs illustrate the interconnected feeding relationships between various organisms. 3. At which trophic level do primary consumers typically reside? A. Second trophic level B. First trophic level C. Third trophic level D. Highest trophic level 2 Answer: Second trophic level (A) Primary consumers occupy the second trophic level in food chains. 4. Why is energy transfer between trophic levels ineﬃcient? A. Producers are unable to convert solar energy. B. Consumers produce more energy than they consume. C. Most energy is lost as heat during transfer . D. Energy is only produced by decomposers. Answer: Most energy is lost as heat during transfer . (C) During energy transfer, signiﬁcant amounts are lost as heat, resulting in limited energy at higher trophic levels. 5. What crucial function do decomposers serve in an ecosystem? A. They form the base of the food chain. B. They introduce new energy into the system. C. They consume primary producers. D. They recycle nutrients by breaking down dead matter . Answer: They recycle nutrients by breaking down dead matter . (D) Decomposers break down dead organisms, returning vital nutrients to the soil for ecosystem health. 6. Which of the following is an example of a food chain? A. Algae → ﬁsh → crocodile B. Tree → caterpillar → bird → snake C. Grass → rabbit → fox → bear D. Grass → rabbit → fox 3 Answer: Grass → rabbit → fox (D) Grass → rabbit → fox is a simple linear example of a food chain. 7. Which statement is true regarding organisms in a food web? A. Food webs are less complex than food chains. B. Each organism occupies only one speciﬁc trophic level. C. Organisms can interact with multiple trophic levels. D. Only producers form connections in a food web. Answer: Organisms can interact with multiple trophic levels. (C) Food webs showcase the multiple interconnected relationships that organisms maintain across different trophic levels. 8. What limits the number of trophic levels in a food chain? A. The number of herbivores present. B. The availability of producers. C. The eﬃciency of energy transfer . D. The presence of decomposers. Answer: The eﬃciency of energy transfer . (C) The ineﬃciency of energy transfer between levels limits the number of trophic levels in a food chain.