Figure 24.0 A Galápagos Islands tortoise

Figure 24.1 Two patterns of speciation

Figure 24.2a The biological species concept is based on interfertility rather than physical similarity

Figure 24.2b The biological species concept is based on interfertility rather than physical similarity

Figure 24.3 Courtship ritual as a behavioral barrier between species

Figure 24.5 A summary of reproductive barriers between closely related species

Figure 24.6 Two modes of speciation

Figure 24.7 Allopatric speciation of squirrels in the Grand Canyon

Figure 24.8 Has speciation occurred during geographic isolation?

Figure 24.9 Ensatina eschscholtzii, a ring species

Figure Long-distance dispersal

Figure A model for adaptive radiation on island chains

Figure Evolution of reproductive isolation in lab populations of Drosophila

Figure Sympatric speciation by autopolyploidy in plants

Figure 24.14a Botanist Hugo de Vries

Figure 24.14b The new primrose species of botanist Hugo de Vries

Figure One mechanism for allopolyploid speciation in plants

Figure Mate choice in two species of Lake Victoria cichlids

Figure Two models for the tempo of speciation

Figure A range of eye complexity among mollusks

Figure Allometric growth

Figure Heterochrony and the evolution of salamander feet among closely related species

Figure Paedomorphosis

Figure Hox genes and the evolution of tetrapod limbs

Figure Hox mutations and the origin of vertebrates

Figure The branched evolution of horses