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