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本帖最后由 细胞海洋 于 2012-3-3 01:11 编辑
7 ?; Z! M5 W- W- B( O* m2 Y! y' z$ D& J9 J) p( \
. B0 J0 a7 i0 D/ bCOVER An adult male brown anole, Anolis sagrei (length ~150
; q3 z, ] a, `' f* x( j+ Pmillimeters from snout to tail), perches atop a branch. The diameter of the 1 c: H5 r. Y2 s& I2 E
vegetation used by brown anoles is a strong selective force on limb length. / b, u8 q. [2 M: \" P' h, r, i2 }
Lizards inhabiting previously unoccupied islands in the Bahamas show genetic and 0 ]$ v8 `7 s6 V g: z- E6 @4 v
morphological differences due to random and selective processes. See page 1086.
6 N) z) Z, w( YPhoto: Neil Losin, University of California, Los Angeles, www.neillosin.com & ~; {1 g: A# `* j; K* l' i
, V+ O4 g: Z, l C
3 K2 l2 T/ k/ }& C2 \$ w: ~ |
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发表于 2012-3-2 13:09
