There can only be one because hes at the top of his food chain
Neurological - by nerves
Endocrinological - by blood and secrets
Answer: Posterior HoxA and HoxD genes play important roles in patterning along the proximodistal axis of the forelimb (10–13). They also are required for activating and maintaining Shh expression in the developing forelimb (6, 7). mark brainliest
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