The periderm includes . The latter designates all tissues outside the vascular cambium. Secondary phloem. Periderm, which includes, Cork. In this sense it includes periderm, cortex, primary and secondary phloem. Cells displaced towards the outside of the vascular cambium differentiate as phloem. In mature barks a large quantity of sclerenchyma, phloem fibres and sclereids (e.g. The term periderm is more distinct than bark. In secondary state, it consists of secondary phloem and all tissues outside it. Correct Answer: all of these. secondary xylem.d. Options (a) cork (b) secondary phloem (c) cambium (d) all of these. The Secondary Xylem is not a part of the Bark and is located beneath the Vascular Cambium, far towards the inner part of the stem. Cork Cambium. cork.. Beyond the cortex, the first periderm layer has formed. The functional phloem … The periderm composed of three components: (1) Phellogen, (2) Phellem and (3) Phelloderm. Thus, ‘secondary cortex’ [13] and ‘pseudo-cortex’ [14] have also been used for this zone. Related Questions: Male gemetes are flagellated in : Pollen tablets are avalable in the market for: bark.b. Be the first to write the explanation for this question by commenting below. Cork cambium or phellogen originates in the living epidermal parenchyma or hypodermal collenchyma cells of stems. It can be distinguished into outer non-living and inner living parts. and shrubs, the zone between the periderm and the secondary phloem is often referred to as ‘cortex’. secondary phloem.e. This is a closer view of the cambium and phloem from cottonwood. (1). Lenticels are openings in the bark of a tree that allows gaseous exchange. During the secondary growth in both stem and root, the peripheral tissues like epidermis, hypodermis and cortex are replaced by a new secondary tissue called the Periderm (bark). Vascular Cambium produces new xylem cells to the inside and new phloem cells to the outside 6. Answer and Explanation: 33. periderm.c. For extrastelar secondary growth the cork cambium or … 2. Periderm —cork cambia, cork 7. Answer to Heartwood and sapwood consist ofa. Secondary Phloem has the same origin as secondary xylem, namely, the vascular cambium. Secondary phloem, like secondary xylem, is a complex tissue. There are bands of phloem fibers in the secondary phloem and clusters of fibers further out into the cortex. Phelloderm. Alstonia) are present. (c): Extra stelar secondary growth means growth in the cortical region, external to slele. Meristems and Secondary Growth 5. Secondary phloem can remain active over several growth cycles. The periderm includes (a) secondary phloem (b) cork (c) cambium (d) all of these. Explanation: No explanation available. However, the cortex can be defined as a primary ground tissue between the epidermis and vascular bundles in a stem [12]. Most of the phloem parenchyma cells are filled with starch grains. 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