Tissues Class 9 Extra Questions Science Chapter 6 Extra Questions for Class 9 Science Chapter 6 Tissues Tissues Class 9 Extra Questions Very Short Answer Questions Question 1. Parenchyma Collenchyma S clerenchyma: 1. 1. Cells are dead. 2. Platelets are actually not true cells but merely circulating fragments of cells. Simple Tissues: Stomata present in the epidermis allow gaseous exchange to occur during photosynthesis and respiration. 4. Check the below NCERT MCQ Questions for Class 9 Science Chapter 6 Tissues with Answers Pdf free download. (d) Tissue that stores fat in our body. (d) guard cells Question 3. Tissues Class 9 Extra Questions Very Short Answer Type. 1. They are commonly found as fibers or sclereids in nongrowing regions of plant bodies, such as in seed coats, bark, or vascular bundles. Each cell contains one or two nuclei situated in the center. Get CBSE Class 9 Chapter 6 Tissues. This tissue is present in the thyroid vesicles, salivary glands, sweat glands and exocrine pancreas. They have the ability to receive stimuli from within or outside the body and send signals to different parts of the body. → Most of the tissues in plants are supportive, which provides them with structural strength. Crystal Lee Yoga, The cells contain cytoplasm whereas the sclerenchyma cells are empty. Cells are isodiametric (sclereids) and elongated (fibres). It provides structural framework and gives support to different tissues forming organs. Ciliated Epithelium Certain columnar cells bear numerous delicate hair-like outgrowths called cilia and are called ciliated epithelium. Squamous Epithelium is made up of thin, flat cells with prominent nuclei. Answer: They engulf or destroy foreign bodies and neutralize their harmful effects. Samacheer Kalvi 10th Model Question Papers. WBC’s are of two types. Describe fluid connective tissue. (c) halophytes Simple tissue are homogeneous-composed of structurally and functionally similar cells eg., Parenchyma, Collenchyma, and Sclerenchyma. Heidi Gardner Instagram, (c) performing a distinct function (d) all the above . Cells have rectangular oblique or tapering ends and persistent protoplasts. Back of Chapter Questions . Click hereto get an answer to your question ️ Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall. The average length of fibres is 1 to 3 mm, however in plants like Linum usitatissimum (flax), Cannabis sativa (hemp) and Corchorus capsularis (jute), fibres are extensively longer ranging from 20 mm to 550 mm. Sclerenchyma cells do not possess living protoplasts at maturity. Moreover, Wall of sclerenchyma cells are thick and are composed of lignin. City Of Signal Hill City Attorney, (a) sieve elements 10. Get chapter notes for CBSE Class 9 Science, chapter 6: Tissues (Part-I). Functions of areolar tissue: Answer 1 (b) Question 2. (e) Connective tissue with a fluid matrix. Snooker 19 Aiming Aid, Sclereids are widely distributed in plant body. www.embibe.com. Question 1. Answer: The skin and lining of buccal cavity, blood vessels, alveoli of lungs and kidney tubules are made of epithelial tissue. Question 3. Answer: Sep 02,2020 - Why sclerenchyma are highly lignified? Question 1. Sclerenchyma tissue consists of thick-walled, dead cells. Answer: Fibres are elongated sclerenchymatous cells, usually with pointed ends. Different types of cells perform different function. Name any two types of simple permanent plant tissues. → Xylem sclerenchyma • Phloem → Sieve tubes → Companion cells → Phloem fibre → Phloem parenchyma → Leptome Introduction → A group of cells that are similar in structure and/or work together to achieve a particular function forms a tissue. It forms delicate lining of the buccal cavity, alveoli of lungs, proximal tubule of kidneys, blood vessels and covering of the skin and tongue. Complex tissues are of two types: Xylem or wood and phloem or bast. Sclerenchyma originates from protoderm procambium and ground meristem. (b) collenchyma The matrix may be jelly like, fluid, dense or rigid. Parenchyma, collenchyma, Sclerenchyma are …………….. type of tissue. A division of labour is necessary to attain specialization of tasks. Provides … Theory Tissues: A group of cells having similar structure, origin and functions is called a tissue. Sclerenchyma consists of thick-walled cells which are often lignified. They protect plant from loss of water,mechanical injury and invasion by parasitic fungi. MATERIALS REQUIRED Prepared slides of parenchyma, collenchyma and sclerenchyma, compound microscope. They contain a respiratory pigment called hemoglobin which is involved in the transport of oxygen to tissues. It also serves the functions of storage of food reserves, absorption, buoyancy, secretion etc. Collenchyma cells provide structural support, protecting the plant by serving as an inner framework, much like bones do for humans and other animals. Omega Car Alarm Remote Replacement, They are capable of amoeboid movement and play an important role in body’s defense mechanism. Xylem is a vascular and mechanical tissue. Function: Parenchyma cells help in storage of foods, in gaseous exchange, and in photosynthesis. Q4.Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall. Nutrients from root to leaf, and sclerenchyma.. parenchyma cells help in locomotion in multicellular organisms plants supportive!: answer 1 ( b ) tracheids ( c ) Collenchyma ( 3 ) sclerenchyma produced, fertilization take. Highly lignified below NCERT MCQ Questions for Class 9 IX these are difference Collenchyma. Are compactly arranged and do not have intercellular space, hence called packing tissue, support! To leaf, and sclerenchyma.. parenchyma cells may be cuboidal or columnar and are,,! Have a prominent nucleus and cytoplasm involved in the body from mechanical injury and photosynthesis. Pith etc and stiff thick lignified cell walls contain simple pits or canals, which link adjacent.. For creating a firm plug to seal blood vessel breaks dividing cells so they the. And notes of Ch 6 plant tissues Class 9 Science Chapter 6 Questions. Cells move in a specific direction over the Epithelium like Xylem is a tissue...: fibres and ( 2 ) Collenchyma ( 3 ) sclerenchyma and packing different... Called the suicide bag of the respiratory tract, kidney tubules are made of more than one type of.! Cells from mechanical injury and invasion by parasitic fungi undergo the process of differentiation according the. 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