The trait that natural selection “selects for” is lifetime Darwinian fitness.  If relative matching of the moths to the background is determining fitness differences, is there any difference in other fitness components in the color morphs of Biston betularia that is influencing the direction of evolution in the three populations shown in the graph?

Curren'S Math For Meds: Dosages & Sol
11th Edition
ISBN:9781305143531
Author:CURREN
Publisher:CURREN
Chapter16: Adult And Pediatric Dosages Based On Body Surface Area
Section: Chapter Questions
Problem 7.4P
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The trait that natural selection “selects for” is lifetime Darwinian fitness.  If relative matching of the moths to the background is determining fitness differences, is there any difference in other fitness components in the color morphs of Biston betularia that is influencing the direction of evolution in the three populations shown in the graph?

(A)
(B)
1.0
0.9 E
0.8 E
0.7 E
0.6 E The melanic form of
Biston betularia declined
in frequency over more
than 40 years in 3 different
locations in Britain.
0.5
0.4
0.3
0.2
0.1
1960
1970
1980
1990
2000
Year
EVOLUTION 4e, Figure 5.1
© 2017 Sinauer Associates, Inc.
Frequency of melanic form
Transcribed Image Text:(A) (B) 1.0 0.9 E 0.8 E 0.7 E 0.6 E The melanic form of Biston betularia declined in frequency over more than 40 years in 3 different locations in Britain. 0.5 0.4 0.3 0.2 0.1 1960 1970 1980 1990 2000 Year EVOLUTION 4e, Figure 5.1 © 2017 Sinauer Associates, Inc. Frequency of melanic form
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