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Transfer of Energy and Matter · Paper 1 — Free Biology SL Practice Questions
1FoundationMCQEnergy flow in ecosystems: Trophic levels and food webs1 markPaper 1~2 min
In a savanna ecosystem, the following feeding relationships are observed:
- grass → zebra → lion
- grass → wildebeest → lion
- grass → insects → lizard → snake → eagle
- grass → insects → bird → eagle
Which organism occupies the fourth trophic level in at least one food chain?
Solutions
2MasteryMCQEnergy flow in ecosystems: Trophic levels and food webs1 markPaper 1~2 min
In a coral reef food web, zooxanthellae are consumed by coral polyps, zooplankton are consumed by both coral polyps and parrotfish, and parrotfish are consumed by sharks. Overfishing removes all sharks from this ecosystem. What is the most likely immediate effect on zooplankton biomass?
Solutions
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