How would you best explain the correlation between an increase in Hox genes and an increase in animal body complexity?
A. Different Hox genes are expressed in different regions of the body.
B. An increase in the number of Hox genes meant that fewer regulatory genes could be controlled in a species.
C. As the number of Hox genes increases, the number of genes encoding proteins for appendage development decreases
D. Hox genes have duplicated several times during animal evolution, but they are not responsible for an increase in body plan complexity.
E. An increase in the number of Hox genes allows for greater specialization in different body regions.
Answer: E
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