Biology · May / June 2022 · Paper 42 · Question 6
0610
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Coral reefs are important ecosystems.
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6(a)[2]
community / communities ;
environment(s) ;
6(b)(i)[1]
4 ;
6(b)(ii)[1]
(reef) shark ;
6(b)(iii)[1]
4 ;
6(b)(iv)[1]
no arrows pointing to phytoplankton / AW ;
6(b)(v)[3]
any three from:
1
idea that energy transfer along a food chain is inefficient ; 2 and 3 named examples of causes of inefficient energy flow between trophic levels ;;
4
energy to, decomposers / decomposer food chain(s) ;
5
limited / not enough, energy to support another trophic level ;
6(c)[3]
any three from:
1
named threat ;
2 and 3 detail of how it is a threat to aquatic ecosystems ;;
4
another named threat ;
5
detail of how it is a threat to aquatic ecosystems ;
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