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Pioneer Education {The Best Way To Success} IIT – JEE /AIPMT/NTSE/Olympiads Classes Revision Question Bank Tissue 1. Name the tissue present in the brain. Sol. Nervous tissue is present in the brain. 2. Write one word for the following (a) Tissue present in soft parts of the plant like cortex and pith of stem. (b) Long and unbranched extension of a neuron. (c) A component of phloem formed by end to end fusion of cells with perforated transverse walls. (d) Thickenings present in sclerenchyma cells. (e) Thin, hair-like projections present at the free ends of cuboidal epithelium. (f) Waterproof layer present on the outer wall of epidermal cells. (g) The pigment present in red blood cells, (h) Zig-zag thickenings in cardiac muscles. Sol. (a) Parenchyma (b) Axon (c) Sieve tubes (d) Lignin (e) Cilia (f) Cuticle (g) Haemoglobin 3. (h) Intercalated discs Which tissue protects the entire body? Sol. Epithelial tissue 4. Name the two types of processes present in neuron. Sol. Axon and demlrites 5. Name the tissue responsible for flexibility in plants. How would you differentiate it from other permanent tissues? Sol. Collenchyma tissue is responsible for llexibility in plants. www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 12 Pioneer Education {The Best Way To Success} 6. IIT – JEE /AIPMT/NTSE/Olympiads Classes Draw a flow chart showing the various types of connective tissues. Sol. The differentiation of collenchymaifrom other permanent tissues is given below S. No. (i) Parenchyma Living cells and isodiametric in shape. Collenchyma Living cells, with thick corners. (ii) Cell walls are thin and made up of cellulose. (iii) Cells have distinct nucleus and a large central vacuole. stores food, waste products and (onus packing tissue. Cell walls are thickened at comers with extra deposition of cellulose and pectin, Cells have distinct nucleus and dense cytoplasm, (iv) (v) 7. It is present in all soft parts of plant, i.e.. in stems, roots, leaves, flowers and fruits. It gives mechanical support and elasticity in plants. It is present below the epidermis in stems and leaves. Sclerenchyma Dead cells, long and narrow with tapered ends. Cell walls are thick due to heavy deposition of lignin. Cells do not have nucleus and cytoplasm. It gives rigidity and mechanical strength to the plant. It is present in xylem and phloem, in shells of nuts, in hard seeds, pulp of pear, etc. Name the following (a) Tissue that forms the inner lining of our mouth. (b) Tissue that stores fat in our body. (c) Tissue that transports food in plants. Sol. www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 13 Pioneer Education {The Best Way To Success} IIT – JEE /AIPMT/NTSE/Olympiads Classes (a) Tissue that forms the inner lining of our mouth-Epithelial tissue. (b) Tissue that stores fat in our body-Adipose tissue. (c) Tissue that transports food in plants-Phloem tissue. 8. Match the column A with the column B. S. No. (i) (ii) (iii) (iv) (v) (vi) Column A Fluid connective tissue Filling of space inside the organs Striated muscle Adipose tissue surface of joints Stratified squamous epithelium Column B Subcutaneous layer Cartilage Skeletal muscle Areolar tissue Blood Skin Sol. S. No. Column A Column B (i) Fluid connective tissue blood (ii) Filling of space inside the organs Areolar tissue (iii) Striated muscle Skeletal muscle (iv) Adipose tissue Subcutaneous layer (v) Surface of joints Cartilage (vi) Stratified squamous epithelium Skin www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 14 Pioneer Education {The Best Way To Success} IIT – JEE /AIPMT/NTSE/Olympiads Classes Chapter Test {Tissue} M: Marks: 30 1. M: Time: 40 Min. Where is parenchyma found in a plant body? [1] Sol. Parenchyma is universally found in plants. It forms the major tissue of softer parts like the epidermis, cortex, pith and leaf mesophyll. It is also found in xylem and phloem. 2. Write any two differences between meristematic and permanent tissues. [2] Sol. (a) Two liquids which are immiscible with each other form the mixture. (b) The heavier liquid will form the lower layer. (c) The method is based on (i) mutual immiscibility of the two liquids (ii) difference in the densities of the two liquids. 3. (a) If a potted plant is covered with a glass jar, water vapours appear on the wall of the glass jar. Explain. [3] (b) What is the function of cardiac muscle fibre? (c) Name the cells of bone and cartilage. Sol. (a) Water vapour released through the stomatal aperture during transpiration, accumulate on the wall of glass jar. (b) These muscles are found only in heart. They help in beating of heart and work 24 hours a day till death. (c) Bone—Osteocytes Cartilage—Chondrocytes. 4. Differentiate between various types of muscular tissues? Draw appropriate diagram. [5] Sol. Differences between various types of muscular tissues are www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 15 Pioneer Education {The Best Way To Success} Characteristic Striated Muscle Voluntary Movement (under our control) Cells are long, cylindrical and Shape of cells unbranched. Microscopic feature Nucleus Location Alternate light or dark bands present. Multinucleate (many nuclei). Limbs of our body. IIT – JEE /AIPMT/NTSE/Olympiads Classes Smooth Muscle Involuntary (not under our control) Involuntary Cells are long with pointed ends (spindle-shaped). Cells are cylindrical and branched, No such bands found. No such bands found. Uninucleate. Uninucleate. Alimentary canal, iris of the eye, in uterus, bronchi of lungs. Cardiac Muscle Heart. Diagram 5. List the characteristics of cork. How is it formed? Mention its role. [3] Sol. (i) It is the outer protective tissue of older stem and roots. (ii) It is formed by secondary lateral meristem called cork cambium, (iii) The mature cork become dead and filled with tannin, resin and ah-, (iv) The cells are arranged compactly without intercellular spaces. (v) The cells become several layers thick, which are impermeable due to deposition of suberin in their wall. Formation of Cork As plant grow older, the outer protective tissue undergoes certain changes. A strip of secondary meristem replaces the epidermis of stem. Cells on the outside are cut-off from www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 16 Pioneer Education {The Best Way To Success} IIT – JEE /AIPMT/NTSE/Olympiads Classes this layer. This form several layers thick cork or bark of the no overlap. Role of Cork (i) It prevents loss of water by evaporation. (ii) It protects plant from the invasion of parasites and other harmful microorganisms, (iii) It is used for manufacture of insulation boards, sport goods, shock absorber, etc 6. Name the protective tissue of animal body. State the types of this tissue. [3] Sol. Epithelial tissue is the protective tissue of animal body. Depending upon the shape and function of the cells, they are of following types (i) Squamous epithelium Simple squamous epithelium consists of extremely thin and flat cells forming delicate lining, e.g,, the oesophagus and lining of mouth. (ii) Cuboidal epithelium It consists of cube-like cells with rounded nuclei and forms the lining of kidney tubules and duct of salivary glands, where it provides mechanical support. (iii) Columnar epithelium It consists of pillar-like cells having elongated nuclei. It is found in inner lining of intestine where absorption and secretion occur. (iv) Ciliated epithelium The columnar epithelium tissue also has cilia, which are hair-like projections on the outer surface of epithelial cells. (v) Glandular epithelium The columnar epithelium is often modified to form glands, which secrete chemicals. 7. Answer the following questions [3] (a) What is division of labour with reference to multicelhilar organisms? (b) Why striated muscles are also known as skeletal muscles? (c) Which structure takes impulse away from a neuron. Sol. (a) In multicellular organisms, different functions of the body are assigned to different group of cells, i.e., these organisms show division of labour. (b) It is because these muscles are attached to bones. (c) Axon of neuron carries impulse away from neuron www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 17 Pioneer Education {The Best Way To Success} 8. IIT – JEE /AIPMT/NTSE/Olympiads Classes Answer the following questions [5] (a) Explain different types of elements present in phloem. (b) Distinguish between xylem and phloem. Sol. (a) Phloem contains following four elements or cells (i) Sieve Tubes They are slender, tube-like structures composed of elongated thin-walled cells. The walls of sieves tubes are perforated and contain sieve plates. (ii) Companion Cells These are generally associated with the sieve tube. They are small thin walled cell containing dense and very active cytoplasm and large elongated nucleus. It is connected with sieve tube with numerous plasmodesmata. (iii) Phloem Parenchyma They are formed of thin walled living cells of parenchyma. (iv) Phloem Fibres These are thick-walled, elongated spindle shaped dead cells which posses narrow luman. They provide mechanical strength to tissue. (b) Differences between xylem and phloem are S. No. (i) (ii) (iii) Xylem Phloem It conducts organic solutes or food It conducts water and minerals. materials. The components of xylem Components of phloem include sieve include tracheids, vessels, xylem tubes, companion cells, phloem parenchyma and xylem fibres. parenchyma and phloem fibres, Three of four elements are living(i.e., Three of four elements are dead sieve tubes, companion cells and phloem (i.e., tracheids, vessels and parenchyma) only phloem fibres are fibres) only xylem parenchyma dead. is living. It provides mechanical strength Phloem fibres provide mechanical to plant. strength to plant. Name the tissue responsible for flexibility in plants. How would you differentiate it from (iv) 9. other permanent tissues? [5] Sol. The tissue responsible for flexibility in plants is collenchyma. The distinction of collenchyma from other permanent tissues is given below: www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 18 Pioneer Education {The Best Way To Success} S. No. (i) IIT – JEE /AIPMT/NTSE/Olympiads Classes Parenchyma It consists of relatively unspecialised cells with thin walls. The cells of this tissue are living. Collenchyma The cells of this tissue are living, elongated and irregularly thickened at the corners, Sclerenchyma The cells of this tissue are dead. They are long and narrow as the walls are thickened due to lignin (a chemical substance which acts as cement and hardens them). (ii) The cells in this tissue contain large intercellular spaces. There is very little intercellular space. The walls of cells are so thick that there is no internal space inside the cell and between the cells. (iii) It provides support to plants and also stores food. It allows easy bending in various parts of a plant (leaf, stem) without breaking. It also provides mechanical support to plants. It provides strength to the plant parts. www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 19