Which statements about energy flow in ecosystems are correct?
1) All energy eventually leaves ecosystems in the form of heat.
2) The average energy transfer between trophic levels is 10 %.
3) The energy stored and lost from an ecosystem is equal to the energy input from the Sun.
1, 2 and 3
2 )
1 and 2 only
3 )
1 and 3 only
4 )
2 and 3 only
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