AP BIOLOGY

Detailed explanation-1: -The vascular cambium and cork cambium are secondary meristems that are formed in stems and roots after the tissues of the primary plant body have differentiated. The vascular cambium is responsible for increasing the diameter of stems and roots and for forming woody tissue. The cork cambium produces some of the bark.

Detailed explanation-2: -This particular type of dicot stem is composed of a cork, cork cambium, epidermis, cortex, xylem, phloem, vascular cambium, and a pith. The vascular cambium is a key characteristic in identifying woody dicots. It is responsible for the making and separation of both xylem and phloem.

Detailed explanation-3: -Cork cambium is the lateral meristem that is accountable for secondary growth substituting the epidermis in the roots and stems. Secondary growth refers to an increase in the girth of a plant which is initiated by cell divisions in the lateral meristems.

Detailed explanation-4: -So, the correct option is ‘Dedifferentiated collenchyma cells of cortex’.

Detailed explanation-5: -Cork cambium is formed in the form of a single layered ring. It forms secondary tissues in the cortical region. Phellogen layer divides and produces cells on either side. The cells that formed on the outer side get differentiated into cork or phellem.