ICSE/ISC Board Exam: Revision Terminology Part 21

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1. Man – 23 pair chromosome – 22 pair = autosomes.

2. Man – 23 pair chromosome – 1 pair = sex/all some/heterosome (Me. Clung)

3. In some extra chromosome are found in addition to present No = supernumerary/accessory/B – Chromosome

4. Lamp brush chromosome – Oocytes – flemming, prolonged diplotene stage of prophase I

5. Lamp brush chromosome – axis

6. Lamp brush chromosome – chromo mere – tightly coiled

7. Lamp brush chromosome – loops – rich in DNA, RNA & protein, lateral

8. Chromomere – coiled, beaded (of polytene respiratory for banding pattern)

9. Chromocenter – heterochromatic regions near centromere (in polytene they appear as attached together)

10. Knobs – Spherical heterochromatin, which may reach size of chromosome itself.

11. Cycas – stem unbranched, male gamete (motile) two cotyledons, pinnately compound leaf, manoxylic wood, megasporophyll loosely arranged, palm like, simple polyembrony.

12. Pinus – Branched more cotyledons, simple leaf, pycnoxylic wood, tail woody perennial dimorphic branches, foliage leaf – like needle, cleavage polyembroyony, male – non motile.

13. Gymnosperm – naked seed plant, overliferous scales arranged in cones.

14. Gymnosperm xylem vessels absent (most common)

15. Gymnosperm phloem lacks Companion cells

16. Leaf – sunken stomata, thick cuticle

17. Lateral translocation of food by transfusion tissues

18. Mega & microsporophyll in cones/strobili

19. Megasporophyll ⇾ orthotropous unitegmic ⇾ female

20. Microsporophyll ⇾ eusporangiate ⇾ male ⇾ non motile

21. Cones/strobili ⇾ monosprorangiate (unisereal)

22. Archegonium (single egg & 1 venter canal cell – neck canal are absent)

23. Pollination by wind, siphonoganic fertilization, development – meroblastic, endosperm – haploid

24. Araucania – thrive at low elevation & warm climates

25. Ephedra – only scaly leave pr. (bisporangiate cones)

26. Conifers – largest, heaviest & longest lived organism in world

27. Embryo = endoscopic – polyembrony

28. Ginkgo biloba – living fossil

29. Cycas – sago palm, tropical, unbranched stem, endodermis & pericycle are single layered radial V. B, adventitious roots which are dichotomous branch stem = caudex

30. Cycas beddomei = trimala hills of Andhra Pradesh

31. Stem Cycas revolute – Japanese – ornamental

32. Cells with sphaeraphides in cortere

33. VB = collateral, endarch, open, eustele,

34. Xylem of tracheid & phloem of sieve tubes.

35. Vascular Bundle concentric rings due to vascular cambium rings

36. Soft wood = manoxylic wood.

37. Absence of lateral veins, presence of transfusion tissue

38. metamorphosed leaflets.

39. Epidermis = cuticle

40. Hypodermis dioeciously = sclerenchyma, Vascular Bundle = inverted omega shaped – diplonelic

41. Mesophyll = palisade + spongy

42. Single layered tapetum – nourishment

43. Male ➾ microsporophyll, central axis, spirally + axis

44.4 microsporophyll arranged tetrahedrally

45. Mature pollen grain has a depression colpus on one side & pollen grains appear boat shaped.

46. Ovules mature in archegonia chamber opposite to pollen chamber.

47. Cycas – biggest antherozoid & biggest ovule

48. Fertilization = siphonogamous – Zooidogamy.

49. Generative cell – stalk cell.

50. Generative cell – Body cell – 2 spernatozoids (antherozoids) – top shaped, multicalited

51. Megaspore = first cell of female gametophyte.

52. Embryo – upper – Neustria

53. Embryo – middle – suspensor

54. Embryo – lower – embryonal

55. Nucellus ⇾ Perisperem

56. Integument ⇾ seed coat

57. Female gametophyte ⇾ endosperm

58. Zygote ⇾ embryo

59. Ovule ⇾ seed

60. Cellularization is centripetal

61. PINUS – female prothallus = endosperms

62. PINUS – sporophyte dominant on gametophyte

63. Seed = adaxial + endospermic

64. Male cone – Cluster behind apical bud at base of new shoot

65. Female cone – in axil leaf of top

66. Pollen grain ⇾ male prothallus ⇾ antheridia cell ⇾ generative + tube cell

67. Megasporophyll ⇾ lower bract

68. Megasporophyll ⇾ upper ovuliferous

69. Female gametophyte – a solid mass of tissue within nacelles endosperm.

70. Function of CoA is to activate acetyl group. (by higher energy sculpture bond)

71. Glycolysis – only glyceraldehyde 3-p under goes further

72. Glycolysis inhibited when ATP in sufficient amount – act as allosteric inhibitor of enzyme phosphor – fructokinase.

73. Multieng complex – matrix of mitochondria

74. Eng actinose has fe ⇾ center

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