ICSE/ISC Board Exam: Revision Terminology Part 14

Get unlimited access to the best preparation resource for UGC : Get detailed illustrated notes covering entire syllabus: point-by-point for high retention.

Stomata

  1. Apple & Mulberry type – only on lower side – Walnut, Oak, Peech.
  2. Potato type – more on lower side – most plants
  3. Oat type – equal on both side – maize, oat.
  4. Water lily – Only upper surface - lotus
  5. Potamogeton type – inactive – in submerged plants.

Ground Tissue System

(i) Extrastelar – Hypodermis, cortex, endodermis

(ii) Intrastelar, pericycle, medullary rays, medulla

Primary Structure of Dicot Stem

  1. Epidermis – outermost, maintain shape, impermeable to liquid & gases, prevent water loss, multicellular hairs.
  2. Cortex – of parenchyma, protective, support, storage.
  3. Hypodermis – multilayered, mechanical support
  4. General cortex – Parenchyma, mechanical support
  5. Endodermis - innermost
  6. Vascular tissue – from procambium – centrifugally end arch open, Collateral arranged in ring, Intrafasicular Cambium between xylem & phloem
  7. Pith – parenchymatous, Central, Medullary rays – storage & conduction
  8. Primary Structure of monocot stem – no cambium (closed VB) Scattered, no difference of pith & cortex Epidermis Hypodermis (Thick wall, Lignified, Sclerenchymatous)
  9. Each Vascular Bundle is surrounded by Bundle sheath (Sclernchymatous)
  10. Conjoint, Collateral, end arch, (In Triticum – pith cavity present)
  11. Secondary Growth
  12. Cambium between xylem & Phloem = Intrafasicular Cambium
  13. Parenchymatous cell between Vascular Bundle – meristamatic ⇾ Interfasicular Cambium
  14. (1) & (2) from vascular cambium
  15. Fusiform initial – Narrow, elongated
  16. Secondary phloem – outer
  17. Secondary xylem – inner
  18. Ray initial – Spherical, parenchymatous.
  19. Monocot leaf – motor or bulliform cells – Rolling of leaves in dry weather
  20. Roots of epiphytes & aquatic plants may contain chloroplasts
  21. Stele dicot stem = Eustele
  22. Monocot dicot stem = Atactostele
  23. Protoxylem lacuna = schizo-lysogenous cavity
  24. Pith cavity – Ricinus in dicots.
  25. Root – endodermis ⇾ Casparian strips (barrage) ⇾ Prevent leakage of nutrients ⇾ passage cells – allow radial diffuser of water
  26. Dicot root = 3 – 6 strands – exarch
  27. Monocot root – polyarch = exarch
  28. Lateral roots arise from pericycle – inner layer of parenchyma – endogenous.
  29. Xylem – bulk of root after secondary growth
  30. Rounded Cork cell in lenticel = complementary cells (have inter cellular space & allow diffusion)
  31. Wood = secondary xylem formed by Vascular Bundle cambium during secondary growth
  32. Wood angiosperm – vessel present – porous, hardwood
  33. Gymnosperm – no vessel – non porous, soft wood
  34. Roots annual rings not well marked due to uniform temperature (except willow) .
  35. Wood can be Heartwood – deal, dark, more durable, resistant to microorganisms – Extractive or Sapwood – peripheral, wetter, light, water conducting
  36. In Wounds callus forms the proturberance producing knots.
  37. W. Dudgeon initiated ecology in India (father of India ecology = R. Misra)
  38. Development of a communing related to set of condition = sere ⇾ last = climare
  39. Plant growing in savanna = psilophytes.
  40. Plants growing in desert/stepper = Eremophytes.
  41. Succulents (drought avoiding)
  42. Stem – opumitia, Euphorbia, E. Splendens, E. Tirucalli, areus.
  43. Leaf – aloe, agave, Begonia, Bryophyllum.
  44. Root – Asparagus, ceiba parviflora

Developed by: