Food Chains and Food Webs
Biology ⇒ Ecology and Environment
Food Chains and Food Webs starts at 6 and continues till grade 12.
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See sample questions for grade 12
A food chain has 5 trophic levels. If the producers have 10,000 kJ of energy, how much energy would be available to the tertiary consumer, assuming 10% energy transfer at each level?
A grassland food chain is as follows: Grass → Grasshopper → Frog → Snake → Hawk. If the population of frogs decreases significantly, what is the most likely effect on the grasshopper population?
Describe how the removal of a keystone species can affect a food web.
Describe the difference between a detritivore and a decomposer.
Describe the impact of invasive species on native food webs.
Describe the role of decomposers in a food web.
Describe what is meant by the term 'trophic level'.
Explain the concept of biomagnification and its relation to food chains.
Explain the difference between a food chain and a food web.
Explain why energy pyramids are always upright in natural ecosystems.
Explain why food webs are considered more stable than food chains.
Explain why omnivores can occupy more than one trophic level in a food web.
In a forest ecosystem, if the population of herbivores decreases, what is the likely effect on the population of producers?
