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As multicellular organisms develop from embryo to adults, gap junctions are made and broken in specific patterns, comprising specific tissues. This suggests which these junctions play a significant role in signaling between cells throughout embryonic development.

A) With the understanding of Gap junctions, speculate on what sorts of signaling molecules might be comprised in this type of development (protein, ions, DNA, small molecules and so on).

B) What is the difference between the different cell types of multicellular organisms? What then is the purpose of the intracellular signaling which takes place during development?

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