An Evolutionary Model of Animal Development Indicates That _____

An evolutionary model of animal development indicates that _____.

A) ​differentiation is positional within a zygote
B) ​homeotic genes are not universal among animals
C) ​homeotic genes are found only in fruit flies, where they are responsible for odd placement of appendages
D) ​new genetic lines are produced less by modification than by unique mutation
E) ​somitesform as blocks of genes in cells randomly distributed throughout the body

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