secondary phloem.e. The periderm includes (a) secondary phloem (b) cork (c) cambium (d) all of these. Related Questions: Male gemetes are flagellated in : Pollen tablets are avalable in the market for: There are bands of phloem fibers in the secondary phloem and clusters of fibers further out into the cortex. 2. Thus, ‘secondary cortex’ [13] and ‘pseudo-cortex’ [14] have also been used for this zone. Alstonia) are present. cork.. Cells displaced towards the outside of the vascular cambium differentiate as phloem. The periderm composed of three components: (1) Phellogen, (2) Phellem and (3) Phelloderm. Correct Answer: all of these. and shrubs, the zone between the periderm and the secondary phloem is often referred to as ‘cortex’. Answer and Explanation: 33. The functional phloem … This is a closer view of the cambium and phloem from cottonwood. Beyond the cortex, the first periderm layer has formed. Bark —includes the periderm, patches of For extrastelar secondary growth the cork cambium or … Secondary Phloem has the same origin as secondary xylem, namely, the vascular cambium. Contributors and Attributions; In roots, the formation of both secondary meristems involves the pericycle. Cork Cambium. bark.b. Explanation: No explanation available. Answer to Heartwood and sapwood consist ofa. However, the cortex can be defined as a primary ground tissue between the epidermis and vascular bundles in a stem [12]. Vascular Cambium produces new xylem cells to the inside and new phloem cells to the outside 6. (1). Be the first to write the explanation for this question by commenting below. In mature barks a large quantity of sclerenchyma, phloem fibres and sclereids (e.g. Lenticels are openings in the bark of a tree that allows gaseous exchange. 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. 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). Periderm —cork cambia, cork 7. Secondary phloem, like secondary xylem, is a complex tissue. secondary xylem.d. Secondary phloem. Phelloderm. Secondary phloem can remain active over several growth cycles. Cork cambium or phellogen originates in the living epidermal parenchyma or hypodermal collenchyma cells of stems. In secondary state, it consists of secondary phloem and all tissues outside it. Most of the phloem parenchyma cells are filled with starch grains. Meristems and Secondary Growth 5. Periderm, which includes, Cork. periderm.c. The periderm includes . (c): Extra stelar secondary growth means growth in the cortical region, external to slele. It can be distinguished into outer non-living and inner living parts. Options (a) cork (b) secondary phloem (c) cambium (d) all of these. 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