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A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of further back helped make possible the evolution of the tetrapod limb. This type of change is illustrative of
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Q28: The question refers to the following
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Q32: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6149/.jpg" alt=" In the phylogenetic
Q44: Which of the following cells or structures
Q48: In the structural organisation of many eukaryotic
Q56: It has been observed that organisms on
Q67: An original section of DNA has the