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A response from within the cell.

A response from outside the cell.

When DNA is super coiled , it cannot be transcribed. Uncoil other parts to allow transcription to occur.

Found at the tips of roots and shootsand in between the xylem and phloem tissue. Groups of unspeciialised stem cells.

ISPCs- type of stem cell that are pluripotent and can be genrated directly from adult cells.