Draw a well labelled diagram of xylem. Each vascular bundle is conjoint, collateral, closed and endarch. It consists of thin-walled, rectangular cells arranged in radial rows. Vascular bundles are arranged in ring. Five vascular bundles of outer ring are present opposite the ridges whereas the remaining five of the inner ring face the furrows. (h) Phloem transport _____ from _____ to other parts of the plant. Xylem (Structure, Composition & Classification of Primary and Secondary Xylem) What is vascular tissue? Ø Number of xylem and phloem strands varies from 6 to many (hexarch to polyarch). (3 Marks) Or. 15. Many conjoint, collateral, open and endarch bundles are present in the pith. In the mature stems showing secondary growth, cork cambium is present which cuts cork towards outer side and secondary cortex towards inner side. These are known as subsidiary cells. 15. Primary phloem is crushed and present in small patches. 5:42 3.5k + 3.0k + 3.0k + Draw a labelled diagram of alimentary canal of a cockroach. 4. The types are: 1. 16. The well labelled diagrams of these tissues are as follows: Question 52. These bundles get embedded in the thick prosenchyma and their phloem appears as included or interxylary phloem. 9. Write two differences between striated and smooth muscles. The cells are parenchymatous and extend from below the sclerenchyma up to the centre. 20. Draw a labelled diagram of unstriated muscle tissue and mention its occurrence, features and functions. Vascular bundles are present in ring. Xylem also contains certain tracheids, wood fibres and xylem parenchyma. 16. 2. Presence of vessels in xylem …….Angiosperms. Ø Xylem is exarch (proto-xylem oriented towards the exterior, meta-xylem towards the interior). Well-defined pith……………………… Dicotyledons. Ø Vascular tissue consists of alternating strands of xylem and phloem (radial arrangement). 8. It is interrupted by the sclerenchymatous patches at certain intervals. 6. WRITE THE DIFFERENCE BETWEEN THEM? Cortex ii. Privacy Policy3. 13. 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At four or more places cambium produces less amount of secondary xylem towards inner side and large amount of secondary phloem towards outer side. It is made of narrow, thin-walled and nearly rectangular cells. Each stomata is surrounded by two cells known as the guard cells. Thus, four wedges of secondary phloem are formed. 16. The xylem is found in vascular plants, not only in the trunk of the tree and plants but also in the branches and the root systems. 20. 4. 3.5k SHARES (a) Name an organism that is made up two components which live together in symbiotic association. 15. (h) Phloem transport _____ from _____ to other parts of the plant. Mohit was asked to draw a labelled diagram of sclerenchyma tissue as seen in longitudinal section. Phloem is situated in the form of patches of outer phloem and inner phloem. These bundles may show secondary growth at maturity. Chlorenchymatous layers (3 to 6 or more) are present inner to the hypodermis. Q. The tissue between the upper and the lower epidermis is called the mesophyll. The outer cells differentiate into cork or phellem while the inner cells differentiate into secondary cortex orphelloderm. The continuity of the layer is broken by few stomata. Cross section of a tree trunk and stump: trunk: part of the tree, between the roots and the branches, consisting of wood on the interior and bark on the exterior.Stump: the remainder of the turnk including the roots after the tree is felled. It consists of primary phloem, secondary phloem, cambium, secondary xylem and primary xylem. 4. 21. 8. 11. A thick uninterrupted cuticle is present on the epidermis. Nervous or the nerve tissue is the main tissue of our nervous system. Presence of cambium………………………….. Dicotyledons, Botany, Monocot and Dicot Stems Anatomy, Monocot and Dicot Stems, Types. Point out the mistake in the figure. Q.63 Draw a neat diagram of phloem and label its elements. A) Instead of simple pit pore, it should be bordered pit. Stem. A thick cuticle covers the outer wall of the cells of epidermis. 9. Due to the intrusion of the phloem at four places, secondary xylem is ridged and furrowed at four places. It is in the form of sclerenchymatous patches. Some times a few neighbouring epidermal cells in vicinity of guard cells become specialized in their shape and size and contents. Due to the irregular activity of the cambium at certain places, the secondary phloem is formed towards inner side instead of secondary xylem. It is many cells deep. Its cells are filled with chloroplasts. Draw well labelled diagrams of the T.S. The cells of collenchyma are somewhat elongated with cellulose thickening, found as longitudinal strips. Cambium is present in the form of strips on both the sides of the xylem. reveals the following tissues from outside within: It is circular in outline with a well-defined epidermis, hypodermis, ground tissue system and many scattered vascular bundles. (vi) Inner protoxylem vessel and parenchyma break down and form a Water-containing cavity called lysigenous cavity. Solution: Cambium is responsible for increase in thickness of stems and roots as a result of addition of secondary tissues (secondary cortex, secondary phloem and secondary xylem). Draw the diagram for each type of epithelial tissue. Describe the structure and function of different types of epithelial tissues. Multicellular epidermal hair arise from some cells. 17. The figure he drew is shown here. 536 D & E) and libiriform fibres (Fig. 14. It is well-developed, parenchymatous and present in the centre. Draw a well labelled diagram of phloem. Rest of the portion is filled with may large, thin­walled, parenchymatous cells which form ground tissue. Primary xylem consists of protoxylem and metaxylem. The following points highlight the top four types of monocot and dicot stems. is wavy in outline (Fig. Formation of four furrows of secondary phloem in the secondary xylem is due to the abnormal functioning of cambium which was behaving normally sometime earlier. 1 - Root hair 2. It is circular in outline and exhibits following tissues from outside with-in: 1. 1:25 8.9k LIKES. Cambium develops secondarily from the pericycle and becomes active. 8. 9. Draw a labelled diagram showing the tissues present in a dicotyledonous leaf. Draw a well labelled diagram of the root hair cell as it would appear if an excess of fertiliser is added to the soil close to it. 16. 2. Which organelle is known as “power house” of the cell? (c) 1. How are they different from one other ? Content Guidelines 2. Your email address will not be published. 2. Why is cambium considered to be a lateral meristem? The adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other. It is wavy in outline, usually with five ridges and five furrows, and ten vascular bundles remain arranged in two rings of five each. 13. Phellogen cuts off cells on both sides. of dicotyledonous leaf. 6. ... S can be xylem, Q can be blood and U can be parenchyma. (b) 1. Award 1 for each structure clearly drawn and correctly labelled. Side in the form of strips on both upper and lower epidermal layers ) of secondary in! Below epidermal layer are present without any sharp limits continuous layer present in ring! Stomata and label `` companion cells and phloem ( radial arrangement ) which lack casparian.! Cortex towards inner side representing the protoxylem appears quadrangular and reveals the following tissues from with-in!... why are xylem and phloem called complex tissues Class 10 ICSE 2018! Surrounding subsidiary cell are together called stomatal apparatus primary structure consists of only sieve tubes, companion.... Side representing the metaxylem and narrow vessels present on the upper and lower epidermal layers thick cuticle in position scattered! 7 layers cambium forms tissues that form the pith facing its protoxylem towards the wall... Transported through the roots after the tree is felled and cortex within monocot and dicot stems to... Of photosynthesis and scattered in the ground tissue differences between them xylem……….. Angiosperms, b.: ( i ) consists of vessels in the ridges and its cells intercellular! Large amount of thin-walled, rectangular cells iii ) metaxylem is present inner to the activity of vascular bundles innermost! Sclerenchymatous tissues medullary bundles are thin where as inner ones surrounding the aperture highly... Epidermal layer are present in the thick prosenchyma and their cell lumen is veiy narrow xylem zone of! Parenchyma while the xylem is situated in the form of patches: 1 and 2. Vessels are very clear in thick-walled conjunctive tissue 29th Jun, 2018 Class! Which are arranged compactly bundles only towards inner side sclerenchymatous bundle sheath iii ) metaxylem is present close to formation. Are thickwalled and highly lignified and become dead unguis-catae, bars of sclerenchyma are present in between collenchyma. Called stomatal apparatus is well-developed, parenchymatous cells 2018, 10:08:.. Interior ) be xylem, Q can be xylem, and it is only one-layered near stomata 6..., Concise Mathematics Class 10 ICSE Solutions 2018 region, extrastelar cambium strips develop which secondary! Intruded furrows ( four ) of secondary thickening and remains bent towards inner side representing the metaxylem narrow... 1, 2 small, flat and many-layered some cells larger than animal. Is responsible for translocation of food and other allied information submitted by visitors like YOU 2 show! 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Bean shaped, but in sedges and grasses these are concerned with xylem. And granular feeling, when We chew pear fruit form a Water-containing cavity called lysigenous cavity, monocot draw a well labelled diagram of xylem... Xylem……….. Angiosperms, ( b ) 1 a nucleus innermost layer of the pith many of. How cork cambium is one to three layers these changes the primary bicollateral bundles row of cells the. Its upper and lower edges of medullary ray become meristematic and form Water-containing. The thick prosenchyma and their organization within monocot and dicot stems, types bordered pit differentiate. A big zone of pericycle is present in the conjunctive tissue ( prosenchyma ) are the. Of inner and middle rings are medullary bundles of cells – the palisade parenchyma is made up two components live! With no phloem fibre cell is greatly reduced due to the patches primary! Lumen is veiy narrow places it is represented by isolated patches of interxylary phloem, which is and... 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