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biology 0610printed 261 · PDF 261
328 pagesrevision 46933
printed 261 · PDF 261
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(d) Scientists have discovered that genes are responsible for wing length in reed warblers.
The most common length of wing has been 66-67 mm for many generations of these
birds.
Explain how natural selection may be responsible for maintaining the mean wing length
of reed warblers at 66-67 mm.
Birds.with.wing.length.of.66-67..mm.Survive..........
Fenn ee neqgperseeeneeenees
SeeE ne HONE HER EHEROH OOOO EOEEEOEEES
[4]
[Tctal: 17]
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