Marine food chains support more trophic levels than land food chains, reaching about:
Athree levels
Bsix levels
Cfour levels
Dten levels
Answer & Solution
Correct answer: B. six levels
1. Each transfer between trophic levels loses most of the energy, largely as heat in respiration.
2. That loss is what caps the number of levels any chain can support.
3. Land chains typically manage three or four levels before too little energy remains.
4. The marine ecosystem supports about six trophic levels.
5. Stopping the marine chain at the tertiary consumer, and so at four levels, is where candidates most often lost a mark.
_Source: NECTA ACSEE 2023 Biology 133/2, Question 6: Ecology_
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