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ANATOMY OF FLOWERING PLANTS

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  What is Plant Anatomy? Plant anatomy is the study of internal structure and organization of tissues in plants. It helps in understanding: Functional adaptation Transport system Growth patterns Tissue Organization in Flowering Plants Flowering plants have three major tissue systems :  Epidermal Tissue System Components: Epidermis Single layer of compact cells No intercellular spaces Covered by cuticle (except roots) Cuticle Made of cutin Prevents water loss Stomata Present mainly on leaves Composed of guard cells Regulate: Gas exchange Transpiration Root hairs Extensions of epidermal cells Increase surface area for absorption Trichomes (in stem) Hair-like structures Protection + reduce transpiration  Functions: Protection Water conservation Gas exchange 🌿 B. Ground Tissue System  Types of Ground Tissue: 1. Parenchyma Living cells, thin cell wall Large vacuole Functions: Storage Photosynthesis ( chlorenchyma ) Air storage ( aerenchyma ) 2. Collenchyma Living cell...
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sample paper class 10 for 2023 (science)

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SECTION -A 1.  The change in colour of the moist litmus paper in the given set-up is due to i. presence of acid ii. presence of base iii. presence of H⁺(aq) in the solution iv. presence of Litmus which acts as an indicator (a) i and ii (b) Only ii (c) Only iii (d) Only iv. EXPLANATION: (option c) litmus changes its colour in the presence of acids and bases hence act as an indicator. in the figure shown, HCl is liberated during the reaction of  NaCl and conc H2SO4 which turns blue litmus red ( acid of the solution has H+ ions) 2. In the redox reaction  MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 (a) MnO2 is reduced to MnCl2& HCl is oxidized to H2O (b) MnO2 is reduced to MnCl2& HCl is oxidized to Cl2 (c) MnO2 is oxidized to MnCl2 & HCl is reduced to Cl2 (d) MnO2 is oxidized to MnCl2 & HCl is reduced to H2O EXPLANATION: (b) it is an example of redox reaction in which a substance which loses oxygen or gain hydrogen is reduced and which gain oxygen and loses hydrogen...
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