The Structure of Evolutionary Theory

Historical Constraints and the Evolution of Development 1147 gardens, but have almost never been reported as natural populations ...

1148 THE STRUCTURE OF EVOLUTIONARY THEORY at first—if only because most of us can only imagine so much novelty at once. As discu ...

Historical Constraints and the Evolution of Development 1149 diversity of arthropods evolved without an increase in Hox gene num ...

1150 THE STRUCTURE OF EVOLUTIONARY THEORY like" genes named Post1 and Post2. In addition, ecdysozoan genomes include Ubx in the ...

Historical Constraints and the Evolution of Development 1151 are secondarily simplified bilaterians, and not the sole survivors ...

1152 THE STRUCTURE OF EVOLUTIONARY THEORY these putative homologies, if expressive of common ancestry, require that primary larv ...

Historical Constraints and the Evolution of Development 1153 genes among various Cnidaria, corresponding to one medial group pre ...

1154 THE STRUCTURE OF EVOLUTIONARY THEORY therefore appears to represent "all head"—an expanded part of the oral end only, with ...

Historical Constraints and the Evolution of Development 1155 so that structure and constraint, the formerly disfavored and negle ...

1156 THE STRUCTURE OF EVOLUTIONARY THEORY confidently reject the Cambrian explosion hypothesis, which rests on a literal interpr ...

Historical Constraints and the Evolution of Development 1157 Cambrian explosion as an anatomical episode in the differentiation ...

1158 THE STRUCTURE OF EVOLUTIONARY THEORY on all continents surely suggests that any coeval bilaterians with hard parts (or even ...

Historical Constraints and the Evolution of Development 1159 complexity could evolve. (But see Valentine and Collins, 2000, who ...

1160 THE STRUCTURE OF EVOLUTIONARY THEORY natural selection), then life's actual pageant on earth becomes highly unpredictable, ...

Historical Constraints and the Evolution of Development 1161 basically fortuitous, survivals among a much larger set that could ...

1162 THE STRUCTURE OF EVOLUTIONARY THEORY on both major branches). Did echinoderms delete their ancestral determinants to evolve ...

Historical Constraints and the Evolution of Development 1163 If we now turn our attention to these "conserved roles in arthropod ...

1164 THE STRUCTURE OF EVOLUTIONARY THEORY Overexpression, in both position and amount, of vertebrate Hox genes has generated at ...

Historical Constraints and the Evolution of Development 1165 ancient form suggests that regional repression of Hox gene expressi ...

1166 THE STRUCTURE OF EVOLUTIONARY THEORY the reasonable explanation that derepression of Dll will not be sufficient, by itself, ...