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Freebase(0.00 / 0 votes)Rate this definition: Cork cambium. Cork cambium is a tissue found in many vascular plants as part of the periderm. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems.
The question is asking to choose among the following choices that states the mechanism does Cork cambium use to protect the stem and in the choices, I would say that the answer would be Deposits of water in the cork cambium act as a barrier and protect the stem from water loss, physical damage, and invasion of pathogens.