AP BIOLOGY

Detailed explanation-1: -The cork cambium forms a major portion of the bark of woody plants. The secondary phloem also is part of the bark, but of course phloem is produced by the vascular cambium. The cork cambium first arises within the cortex as a concentric layer forming a cylinder of dividing cells (Fig.

Detailed explanation-2: -C: The cambium cell layer is the growing part of the trunk. It annually produces new bark and new wood in response to hormones that pass down through the phloem with food from the leaves.

Detailed explanation-3: -The cork cambium, or phellogen, produces the protective outer layers of the bark.

Detailed explanation-4: -The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems. It is found in woody and many herbaceous dicots, gymnosperms and some monocots (monocots usually lack secondary growth).

Detailed explanation-5: -The cork cambium, being meristematic, gives rise to new cells. The new cells growing inwards form the phelloderm whereas the new cells growing outwards form the cork (also called phellem).