Target cells that are known to be having specific receptor for an antigent or antibody and the main reason why all cells are not target cells for the hormones is that they act as the focus for contact by phagocyte.
Answer:
Rift valleys and Mid-oceanic ridges are created from diverging plates.
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Answer:
Exoskeletons
Explanation:
It provides support and structure just like a backbone
Xylem carries water and dissolved nutrients