8. What are trophic levels?
How many trophic levels can a
food chain have?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Trophic levels correspond to
on a food chain. producers
always belong to first trophic level
and to the last trophic
, consumers that directly eat
producers belong to the trophic
level and so .

There is no limit the number
of trophic on a chain, since
orders of consumers can .