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Exodermis in dicot root

Cells of cortex consists of leucoplasts and store starch grains. Sometimes, outer layer of cortex becomes cutinized and forms exodermis of root. Cortex cells store food and conduct water from epiblema to the inner tissues The epiblema is short-lived, and in older roots, it gets replaced by a lignified, suberized exodermis. In dicot roots, the epidermis and other root tissues get removed and later replaced by cork cambium. On the other hand, in the monocot plant, the epidermis persists and forms a protective cuticle Structure of Monocot and Dicot Root 1. Piliferous Layer or Epiblema or Epidermis. Epidermis or Epiblema is the outermost layer of roots which is composed of... 2. Cortex. Cortex is the tissue present underneath the epidermis which is composed of many layers of cortical cells. 3. Endodermis. The. In roots with a mature exodermis, the barrier to apoplastic inflow of ions occurs near the root surface, but prevention of backflow of ions from the stele remains a function of the endodermis Some roots also develop a specialized layer—the exodermis—beneath the epidermis. The exodermis arises from one or several of the sub-epidermal layers of the cortex. The cell walls of exodermis become suberized. The exodermis is found to be present in few dicots

The exodermis is the other membrane of the root. The exodermis represents a unicellular cell layer located at the outer surface of the root directly below the root... The exodermis, forming an 'outer' apoplastic barrier at the root surface, mainly establishes the root/soil interface... It is a. C. Hypodermis - it is absent in dicot root. D.Exodermis - outermost layer with suberised cell wall. So, the correct option is 'Rhizodermis'. Answer verified by Toppr. 316 Views The older roots of dicot root are enclosed by cork while in monocot root they are covered with exodermis. Dicot root examples of plants are beans, peanuts, and mangos while monocot root plants are maize, palm, and bananas. You May Also Enjoy: Difference between Vascular and Non-Vascular Plants Dicot Root. Monocot Root. Pericycle. Gives rise to cork cambium, parts of the vascular cambium, and lateral roots: Gives rise to lateral roots only: Vascular Tissues. Has a limited number of Xylem and Phloem: Has a higher number of Xylem and Phloem: Shape of Xylem. Angular or Polygonal: Round or Oval: Number of Xylem and Phloem. 2 to 8: 8 to many: Pit

The exodermis (hypodermis with Casparian bands) of plant roots represents a barrier of variable resistance to the radial flow of both water and solutes and may contribute substantially to the overall resistance. The variability is a result largely of changes in structure and anatomy of developing roots In some wetland plants, the outer part of the root (i.e., epidermis, exodermis, and sclerenchyma) of emerging lateral root primordia has an oxygen leaky zone called a window. The exodermis at the. In dicot root, older roots are enclosed by cork whereas, in monocot root, older roots are covered by exodermis. Secondary growth takes place in dicot roots. Conversely, there is no secondary growth in monocot roots. Pea, beans, and peanuts, etc. have dicot roots Most evidence indicates that the development of suberin lamellae in both the endodermis and exodermis increases the resistance of the root to the radial flow of water. Passage cells thus provide areas of low resistance for the movement of water, and the position of these cells in the endodermis (i.e., in close proximity to the xylem) is.

Internal structure of dicot root - Online Biology Note

  1. The root's anatomy is different for monocot and dicot plants. Hence we will see them separately as. The Anatomy of dicot root. The primary dicot root appears circular in transverse sections and cylindrical in outline. The tissue layers present in dicot root from outside to inside are. Epiblema, Cortex, Endodermis, Pericycle, and; Vascular strands
  2. In monocot and dicot roots, xylem is exarch i.e protoxylem lies towards the periphery and Metaxylem towards the center. In both dicot and monocot roots, endodermis consists of barrel shaped parenchyma without intercellular spaces. In both monocot and dicot roots, pith consist of thin walled, polygonal parenchyma cells with intercellular spaces. Both monocot and dicot roots have radial vascular bundles
  3. The endodermis is the central, innermost layer of cortex in land plants. It is a cylinder of compact living cells, the radial walls of which are impregnated with hydrophobic substances to restrict apoplastic flow of water to the inside. The endodermis is the boundary between the cortex and the stele. In many seedless vascular plants, the endodermis is a distinctly visible layer of cells immediately outside the vascular cylinder in roots and shoots. In most seed plants, especially woody types, a
  4. Dicot root. Monocot root. The cortex area is narrow. The cortex region is wide. The epiblema, cortex and endodermis are peeled and replaced by cork. There is no formation of cork and only the epiblema is peeled off. Older dicot roots have a covering of cork. Older monocot roots show a covering of exodermis
  5. The exodermis arises from one or several of the sub-epidermal layers of the cortex. The cell walls of exodermal became suberized. The exodermis is present in few dicot. Cortex. Massive and thin-walled rounded or polygonal parenchyma cells in space. The parenchyma of cortex contain starch grains. The dicot root possess secondary growth parenchyma
  6. In monocot roots, xylem and phloem tissue bundles are arranged in a circular fashion around the central pith, which consists of ground tissue (parenchyma). Monocot roots have a larger number of vascular structures than dicot roots. 4. In dicot roots, the vascular structures are located in the middle of the root, surrounded by vascular cambium

Pith: In dicot root pith is less developed or absent. Passage cells are found in both exodermis and endodermis in hanging roots of orchids. Internal Structure of Dorsiventral Leaves. Cuticle is present on both surfaces but cuticle of upper surface is-more thick A root-hair consists of the following parts: a thin cell wall, a thin lining of cytoplasm which contains the nucleus and a comparativelylarge vacuole containing cell sap. Function o The main function of the root hairs is to increase the area of absorption of the root. The Mature Region The mature region is situated above the root hair region Dicot root has a tap root-like arrangement and is present in dicot plants. It has a constant amount of xylem and phloem such that, xylem is in 'X' form and is bounded by phloem. Dicot root shows secondary growth. Pea, beans, and peanuts, etc. are examples of dicot roots. Monocot root has fibrous root-like formation and is present in monocot plants The cross section of a plant root is a little like the cross section of a piece of lasagna. If you've ever made lasagna, then you know that the first thing in the pan is a layer of large, flat.

Answer. In dicot roots, the pith is either absent or not well developed. On the other hand in case of monocot root, we find a well developed pith across all the genera. Thus, the correct answer is option C. Answer verified by Toppr (1) Casparian bands and passage cells are well developed in monocot root in comparison to dicot root. (2) Endodermis acts as a watertight jacket (3) Casparian bands are also present in dicot stem but they are less developed. 4. Pericycle :-It is single layered and composed of prosenchyma ADVERTISEMENTS: The upcoming discussion will update you about the differences between Dicot Root and Monocot Root. Difference # Dicot Root: 1. Cortex is comparatively narrow. 2. The epiblema, the cortex and even the endodermis are peeled off and replaced by cork. ADVERTISEMENTS: 3. Older root has a covering of cork. 4. Endodermis is less thickened [

Usually in an old root of Zea mays, a few layers of cortex undergo suberization and give rise to a single or multi-layered zone- the exodermis. This is a protective layer which protects internal tissues from outer injurious agencies. The starch grains are abundantly present in the cortical cells 10. Root hairs originate from (a) pericycle (b) epidermis (c) endodermis (d) exodermis. Ans. b . 11. Vascular bundle is enclosed within a well-developed sclerenchymatous sheath in (a) monocot stem (b) dicot stem (c) monocot root (d) dicot root. Ans. a . Anatomy of Flowering Plants NEET mcq | Anatomy of Flowering Plants mcq 12 A plant's endodermis is a single cylindrical layer of cells that does not permit water to flow between the cells. Not all plants have an endodermis, but the structure plays an important role in transporting water from the ground via the roots up through the rest of the plant. The endodermis thus allows trees and. Some roots also develop a specialized layer—the exodermis—beneath the epidermis. The exodermis arises from one or several of the sub-epidermal layers of the cortex. The cell walls of exodermis become suberized. The exodermis is found to be present in few dicots. Mark me as Brainlies Cortex: It is located below the epiblema. It consists of many layers of thin-walled rounded or polygonal parenchymatous cells with sufficiently developed intercellular spaces between them. Cells of cortex consists of leucoplasts and store starch grains. Sometimes, outer layer of cortex becomes cutinized and forms exodermis of root

Monocot vs. Dicot Root: Differences and Similaritie

Functions of Pericycle in Plants - QS Study

Monocot vs Dicot Roots- Definition, Structure, 18

Pericycle in monocot roots produces only the lateral roots while the pericycle gives lateral roots, cork cambium, and the part of the vascular cambium in dicot roots. The pith of the monocot root contains a large number of starch grains. But in dicot root, Pith is completely shattered. In the Monocot Root, Xylem and phloem are numerous in number Dicot plants Monocot plants: 1. cotyledon Tap root. Fibrous root. Pith is absent or highly reduced. Well developed pith is present. Cortex is not differentiated into exodermis. Cortex is differentiated into outer exodermis or hypodermis. 5. stem exodermis. 17. Pith is very well developed in monocot root and monocot srem monocot root and dicot root dicot root and monocot stem monocot root and dicot stem. 18. Which type of fibres mainly occur in phloem Fibre tracheids Libriform Sclereids Wood fibres. 19. Wound healing in plants is initiated b

The typical monocot roots show following features: Epiblema is single layered, thin walled, colorless, polygonal without intercellular spaces, with presence of unicellular root hairs, hence also called as piliferous layer or rhizodermis. Cortex may be heterogeneous with outer dead exodermis. Endodermis consists of barrel shaped parenchyma. 19. Assertion Epidermis in the dicot root is composed of cutinised cells. Reason The exodermis in the root offers protection to the inner parts in the absence of epidermis. (a) Both assertion and reason are true and reason is the correct expiation of the assertion Smilax herbacea.Two stages of primary growth. Ranunculus is a typical dicot with respect to root structure. In its general features, Smilax can be used to typify root structure in the monocotyledonous plants. Note the numerous protoxylem poles, the lack of conducting elements at the center (pith may be said to be present), and the stages of thickening of the endodermis 4.12 Tabulate the anatomical differences between monocot and dicot root. Dicot root. Monocot Root-Tetrach, diarch, tiarch-Polyarch-has vascular cylinder-with vascular cylinder-without pith-with pith-without exodermis-with exodermis-exhibits secondary growth-only primary growth-with vascular cambium-without vascular cambium-ground tissue can't. The exodermis is a specialised hypodermis, which is also equipped with CSs and often with suberin depositions (Peterson & Perumalla, 1990; Schematic view of typical dicot root cross-sections with arbuscular mycorrhizal fungi entering root tissue through exodermal PCs and remaining in the cortex. It is unknown if this occurs in xylem pole.

Cross Section of a Young Dicot Root. STUDY. PLAY. Epidermis. outermost region of the cells in the cross section. Epidermis. single layer of living cells that may have root hairs made up of the exodermis, parenchyma, and endodermis. Exodermis. layer of cortex directly below epidermis. Exodermis. may sometimes contain a Casparian strip and. Dicot Root gegen Monocot Root. Entsprechend der Gesamtzahl der Keimblätter im Samen werden blühende Pflanzen in zwei Arten unterteilt, d. H. Dicots und Monocots. Dikots sind die Pflanzen mit zwei Keimblättern im Samen, während Monokots ein einzelnes Keimblatt haben Questions and answers to General Botany Laboratory Manual by the Department of Botany, University of the Philippines. Exercise 5: The Root. Includes dicot root, monocot root, secondary growth, bark, wood, root systems (tap/fibrous), development of root, anatomy of root, xylem differentiation, root hair, branch root, specialized roots, and velamen Roots are not structured into nodes and internodes nor do we find leaves at roots. Buds in roots have not been reported of grasses yet. In contrast to dicot roots, grass roots are polyarch. Grasses do not develop tap root systems but secondary fibrous root systems. Many grass roots contain aerenchyma channels done The Tissue System Total Questions - 74. question_answer 1) Layer of cells between endodermis and vascular bundles is called [AMU 1983, 89] A) Epidermis. done clear. B) Pericycle. done clear

Internal Structure of Root (With Diagrams)

A regenerating root cap is the helmet on the tender root tip. In addition to protecting the tip, the root cap is involved in gravity detection. Root cap, a huge example (on a monocot) Roots vary in structure, and Monocots somewhat different from Dicots. A young Dicot root usually has a broad region of soft parenchyma called the cortex ROOTS. Roots are the first organs to emerge from the seed. They penetrate the soil and are responsible for the uptake of water and minerals from the rhizosphere.Roots contain a tissue called Endodermis.The endodermis is one of the most important vegetative adaptations of terrestrial plants because it asserts biological control over water and mineral uptake in the root

Anatomical Characteristics of Dicotyledonous Roots Botan

Fig. 8 Vernonia x.s. - dicot root. 5. Cross section of a woody dicot root. Fig. 9 Vernonia x.s - woody dicot root. 5.2 Do you find root hairs? Why? - No. The secondary growth removes the epidermis, destroying the root hairs. 5.3 Which tissue usually functions in food storage in a old root? a young root? - Parenchyma tissu MULTIPLE CHOICE QUESTIONS AND FILL IN BLANKS OF STRUCTURE OF PLANTS PARTS 1. Casparian strips are present in (a) Cortex (b) Epidermis (c) Stele (d) Endodermis 2. The outer most part of the stele consists of one or more layers of parenchymatous cells. The outer layer of this parenchyma is called: (a) Cortex (b) Epidermis ' (c) Stele (d) pericycl

Q.43. In the monocot root, we obseve (a) suberized exodermis, polyarch xylem , pith (b) exodermis, endarch, tetarch closed bundles (c) conjoint, collateral, open, polyarch vascular bundle (d) suberized exodermis, casparian strip, passage cells, cambium. Q.44. In a dicotyledonous stem, the sequence of tissues from the outside to the inside is A dicot root differs from a monocot root in which of the following - A dicot root differs from a monocot root in which of the following - Books. Physics. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Presence of exodermis presence of ill-developed (Poorly developed ) pith Separate radial vascular bundle. The coftex of a monocot root has three functions are (i) Conduction of water from the root hairs to the inner tissues. (ii) Storage of food. (iii) Outermost layer of the cortex produce protective exodermis in the older roots Epidemis / Exodermis. Tough dermal layer. parenchyma cells dicot root. starch grains present in cortex. parenchyma cells monocot root. fibrous thin roots not much nutrients stormed. Epidemis strengthened by. sclerenchyma cells. monocots store nutrient in. modified leaves rhizomes

Difference between Endodermis and Exodermis - QS Stud

  1. The third image is another example of a monocot root structure. The epidermis layer of cells is found the outermost edge of the root and is the same for both monocot and dicot roots. In from the epidermis is the exodermis layer of cells (not labeled in on the image)
  2. exodermis . 3 / 30. Vascular cambium is a meristematic layer that cuts off. primary xylem and primary phloem. xylem vessels and xylem tracheids. primary xylem and secondary xylem. dicot root . 19 / 30. Largest number of chloroplast is found in. palisade tissue . spongy tissue.
  3. this is a video of supporting NEET students, with clear cut explanation, dear all students utilize this video, thank yo

The outermost cell layer of the root's vascular tissue is the pericycle, an area that can give rise to lateral roots. In dicot roots, the xylem and phloem of the stele are arranged alternately in an X shape, whereas in monocot roots, the vascular tissue is arranged in a ring around the pith SOLUTION (a)Monocot root and dicot root. S.No Monocot Root Dicot Root 1 Cortex is very wide. Cortex is comparatively narrow. 2 Outer cortex is usually differentiated Outer cortex is usually not differentiated into exodermis. into exodermis. 3 Endodermis contains prominant Endodermis contains prominant casparian strips only in young ones. casparian strips. 4 Xylem and phloem bundles Xylem and. 3.1 Where are the youngest roots located? The oldest? The youngest are located at the root tip while the oldest are located at the base. 3.2 Identify the structure covering the root tip. Root cap. 4.1 Do you see the sub-epidermal cells (hypodermis or exodermis) in your specimen? If so, how many layers? Ye Target DPP Test Contact Number: 9667591930 / 8527521718. Page: Prin Root hairs are unicellular, epidermal outgrowth which are only temporary. Branch roots are multicellular, endogenous, long lasting and develop from mature roots. 4.11 What region occupies the largest in the root? Region of elongation. 4.12 Tabulate the anatomical differences between monocot and dicot root

Exodermis; Pericycle; 8. The apical meristem of the root is found in. Taproots; Radicals; Adventitious roots; All the roots; 9. Bordered pits are found in. Vessel wall; Sieve cells How many radial vascular bundles are found in dicot roots? Four; Six; Two; One; 18. Bicollateral bundles are found in the stem of. Pumpkin; Sunflower; Dracaena. bundles are found in dicot roots? a) Four b) Six c) Two d) One 84. Bicollateral bundles are found in the stem of a) Pumpkin b) Sunflower c) Dracaena d) Gram 85. Vascular bundles in dicot stem are a) Closed, conjoint, endarch b) Open, conjoint, endarch c) Closed, conjoint, exarch d) Open, conjoint, exarch 86. Wound healing in plants i dicot plants rs science, monocot and dicot leafs with diagram plants, biology 1409 chapter 25 understanding stems roots and, monocot root cross section structure with ppt easy, cross section of dicot leaf things under a microscope, solved label the dicot leat diagram in figure i using the, ts of dicot leaf under a microscop

Monocot and dicot root structure Sclerenchyma cells of the exodermis and xylem cells stain red, and phloem cells stain blue. Other cell types stain black. The stele, or vascular tissue, is the area inside endodermis (indicated by a green ring). Root hairs are visible outside the epidermis. (credit: scale-bar data from Matt Russell) Inside. Exodermis prevents the leakage of water from the root. Exodermis plays a prominent role in roots where epidermis is short-lived. 2. General Cortex. General cortex is the middle zone of cortex. It is present beneath the exodermis. It consists of many layers of parenchymatous cells. The cells are round or oval, thin walled, living and arranged. Hypodermis (exodermis). Most dicot (eudicot) roots have a solid core of xylem in their center whereas most monocots have a pith composed of parenchyma. Pericycle. The pericycle is a cylinder of parenchyma, one or at most a few cells in width, which lies in the stele immediately inside the endodermis. The cells retain their ability to divide. etc. In monocots and several old roots, few layers of cortex just below epiblema give rise to a single or multilayered cuticularised sclerenchymatous region called exodermis. Cortex helps in mechanical support to the roots (like hypodermis to stem). 3. Endodermis is innermost layer of cortex made from barrel shaped parenchyma

Sunflower Root, c

In dicot root, the outermost layer of tubular living cells i

For example, we found that the transcripts of Os04g0125700 are highly abundant in the root exodermis (Supplementary Fig. S10), whereas Os01g0248900 and Os10g0578200 are exclusively expressed in. Smilax herbacea.Two stages of primary growth. Ranunculus is a typical dicot with respect to root structure. In its general features, Smilax can be used to typify root structure in the monocotyledonous plants. Note the numerous protoxylem poles, the lack of conducting elements at the center (pith may be said to be present), and the stages of thickening of the endodermis #AZScreenRecorderThis is my video recorded with AZ Screen Recorder. It's easy to record your screen and livestream. Download link: https://azrecorder.page.li..

20 Differences between Dicot Root and Monocot Root (With

B.SC 2nd year by Dr.Raksha mishr largeDicot root typically experiences secondary growth due to vascular cambium while monocot root does not experience secondary growth.The older roots of dicot root are enclosed by cork while in monocot root they are covered with exodermis.Dicot root examples of plants are beans, peanuts, and mangos while monocot root plants are maize, palm For the analysis of metabolites and proteins in root epidermis/exodermis (outer tissue) and root cortex/vasculature (inner tissue), tissues were separated using forceps The tissue at the center of monocot roots consists of xylem and phloem (vascular bundle) and it is surrounded by the cortex which is made of parenchyma cells (Figure 2). The outermost layer of the root is called the epidermis followed by the exodermis or sclerenchyma. The endodermis is an inner layer of cells surrounding the vascular bundle

Difference Between Dicot and Monocot Root - BYJU'

Description: Cork cambium in a dicot root is derived from pericycle. It is a tissue found in many vascular plants as a part of the epidermis. It is one of the many layers of bark, between the cork and primary phloem. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems It is a central zone of parenchymatous cells. Pith is normally absent in dicot roots where it is replaced by xylem bundles. Root-hairs are permeable and consist of pectic substances and cellulose which are strongly hydrophilic (water-loving) in nature. Root-hairs contain vacuoles filled with cell-sap. Mechanism of water absorption is of two types Roots are used for the storage of food and the intake of water. This lesson explores types of roots, root cap, epidermis, primary root tissue, root hairs, and the plant vascular cylinder Structure of dicot root: Endodermis, exodermis; Origin of lateral root. Anatomical Characteristics of Dicotyledonous Roots. Anatomy of dicot root-Slideshares. Dicot root anatomy-Youtube. histology among microscopic view of dicot root, monocot root, dicot stem, monocot stem-Youtube. Origin of lateral roots. Root cap: primary roots lateral roots vascular cambium while monocot root does not experience secondary growth. The older roots of dicot root are enclosed by cork while in monocot root they are covered with exodermis. Dicot root examples of plants are beans, peanuts, and mangos while monocot root plants are maize, palm, and bananas

3) More internal primary root structure Draw and thoroughly label a monocot and eudicot root cross section (both specimens are on the same prepared slide; Monocot and Dicot root x.s.) observed at low magnification Label epidermis, exodermis, cortex, endodermis, casparian strip, pericycle, xylem, phloem, pith a) Monocot root c.s. Vascular. Endodermis c. Exodermis d. Pericycle 8. The apical meristem of the root is found in a. Taproots b. Radicals c. Adventitious roots d. All the roots 9. Bordered pits are found in a. Vessel wall b. Sieve cells c. Sieve tube d. Companion cells 10. Where in epiphytes are velamen cells located? a. Below the endodermis b. Below the epidermis c. Just. Secondary Growth in Dicot Root Definition. Secondary growth increases the thickness or girth of the plant, which is the result of cell division in the cambia or lateral meristem. The secondary growth in the root takes place due to the formation of secondary tissues by lateral meristems.Most of the dicotyledonous roots show secondary growth in thickness, like that of dicotyledonous stems

Herbaceous Dicot Root: Closed Vascular Bundle in Mature Ra

The internal anatomy of root shows the following regions. Epiblema or Piliferous Layer: Single layered, compactly arranged cells, cuticle absent and provided with unicellular root hairs. Cortex: General Cortex is homogenously made of parenchyma. In old roots the epiblema dies off and the cells are suberised to form the exodermis For studying similarities and differences of internal structure of monocot and dicot root, we will study with help of transverse section of maize and gram respectively. Question 2. How you will differentiate between monocot and dicot root? Exodermis: It is the outermost layer of the cortex. The lateral walls of the exodermal cells are. Differences between monocot and dicot roots Older roots are covered by an Exodermis: Older roots are covered by a Cork: Stem. A stem is the plant axis that bears buds and shoots with leaves and roots at its basal end. Function of stem. Conducts water and mineral salts from roots to leaves

exodermis: a variable apoplastic barrier Journal of

In dicot roots, the number of xylem bundles usually vary from 2 to 6 and in monocot roots, it usually ranges from 6 to 20. Depending on the number of xylem bundles, roots are designated as monarch (with one xylem bundle), diarch (two bundles), triarch (three bundles), tetrarch (four bundles), pentarch (five bundles) or polyarch (many bundles) 44. The multicellular, uniseriate layer/ tissue in roots that gives rise to lateral roots also is a) Endodermis of dicot root b) Pericycle of dicot root c) Pericycle of monocot root d) Both a & b 45. In anatomy of primary dicot stem two types of plastids are found in a) Pericycle b) General cortex c) Endodermis d) Medulla ZOOLOG The upcoming discussion will update you about the differences between Dicot Root and Monocot Root. 4. These plant roots have a comparatively wider, and fibrous root-like structure. Xylem vessels are a rounded or oval shape. Dicot plants show a tap root system and it grows down vertically. The difference between monocot root and dicot roots' anatomical features is secondary growth are present. (a) dicot root (b) monocot root (c) dicot stem (d) monocot stem. Answer and Explanation: 38. (a): The vascular tissue of the root is characterised by radial arrangement of vascular bundles i.e., xylem and phloem occur in separate patches on alternate radii. The numbers of xylem and phloem groups vary from two to six

Video: Function of passage cells in the endodermis and exodermis

karoto - WiktionaryExam #3 at Loyola University Chicago - StudyBlueChapter 8 Microscopes- Plant Structure - Biology 111 with

The internal structure of Monocot root: Is almost similar to the internal structure of dicot root with a slight variation in stellar structure. Usually in monocot root more than six xylem bundles are found. This is called 'polyarch' condition. Cortex and medulla are relatively bigger. Secondary growth is absent 1. Epidermis is the outermost layer of (dicot) stem with multicellular epidermal stem hairs. The cells are living, barrel shaped and compactly arranged without intercellular spaces and chloroplasts. They may contain stomata for gaseous exchange. The epidermis is externally covered by thick cuticle In dicot roots, the xylem and phloem of the stele are arranged alternately in an X shape, whereas in monocot roots, the vascular tissue is arranged in a ring around the pith. Figure 30.18 In (left) typical dicots, the vascular tissue forms an X shape in the center of the root cross section: Mature Ranunculus root common name: Buttercup magnification: 400x Berkshire Community College Bioscience Image Library The cortex is well-developed and divided into two zones; a narrow outer layer of closely packed smaller parenchyma cells (exodermis) and a wide inner layer of larger open aerenchyma cells The inmost area of the cortex is bounded by an endodermis or starch sheath. Monocotyledonous root: Example: Canna. Outline almost circular. The nature of epiblema, exodermis, cortex, endodermis and pericycle is similar to that of Dicot root. However in cortex, large air spaces of schizogenous origin may be seen. The nature and arrangement of vascular bundles are also similar to that of Dicot root Sep 5, 2017 - Anatomy of a Typical Monocot Root Cross Section Structure (TS / CS) Under Microscope with Labelled Diagram, Description and PPT. Radial Vascular Bundle Monocot Root