Test: Natural Selection and Cliff Swallows Phenomenon Which claim about reproductive fitness is correct, based on the graphs below?
с
113
Mean Wing Length of All Road Kills
O Mean Wing Length of Population at Large - -
111
Total road kills
109
А
• Road kills
o Nosts
20 OOO
40000
.
35000
16
30000
25000
20000
8
15000
10000
4
5000
0
LO
1984 1988 1992 1996 2000 2004 2008 2012
Year
Total cliff swallow nests
DO
107
Wing length (mean)
oo oo
000
105
103
1984 1988 1992 1996 2000 2004 2008 2012
Year
A graph from the study showing the stop decline in road killed swallows over time, in
spite of increasing populations
O Cliff swallows with longer wings are faster than short-winged birds.