NEET-Biology-4-Cell : The unit of life : Cell introduction

  November 01, 2020   ,   Edit
1.Who first explained that cells divide and new cells are formed from pre-existing cells ? 
Answer : Rudolf Virchow

2.Some organisms are composed of a single cell and are called _______________ organisms while other organisms are composed of many cells are called ___________ organisms. ? 
Answer : unicellular,multicellular

3.Various chemical reactions occur in the cytoplasm to keep the cell in the living state (True or False)?
Answer : True

4.Which non-membranous organelle is found in both prokaryotic and eukaryotic cell ? 
Answer : Ribosome

5.Who formulated the cell theory ? 
Answer : Schleiden and Schwann

6.Who discovered the first living cell ? 
Answer : Anton Von leeuwenhoek

7.All living organisms have a cell wall surrounding the cell membrane (True or False)? 
Answer : False

8.Cell that has membrane bound nucleus is called _______________ whereas cell that lack membrane bound nucleus is called _______________ . ? 
Answer : eukaryotic, prokaryotic

9.Anything less than a complete structure of a cell does not ensure independent living (True or False)? 
Answer : True

10.Main arena of various cellular activities of the cell is ? 
Answer : Cytoplasm

11.Who is responsible for extensive compartmentalisation of cytoplasm in eukaryotic cell ? 
Answer : Membrane bound cell organelles

12.Who gave the cell theory a final shape ? 
Answer : Rudolf Virchow

13.All eukaryotic cells have similar shape (True or False)? 
Answer : False

14._______________ a British Zoologist, studied different types of animal cells and reported that cells had a thin outer layer which is today known as the plasma mernbrane. ? 
Answer :Theodore Schwann (1839)

15."Omnis cellula-e-cellula" statement was given by ? 
Answer : Rudolf Virchow

16.Cell is the fundamental structural and functional unit of living organism (True or False) ? 
Answer :True

17.Shape of the cell may vary with the function they perform (True or False)? 
Answer : True

18.Which non-membranous cell organelle is found in animal cell and helps in cell division ? 
Answer : Centriole

19.The largest isolated single cell is the _________________ ? 
Answer : egg of an ostrich.

NEET-Biology-4-Anatomy of Flowering Plants-3

  August 10, 2020   ,   Edit
41. Tracheids are elongated cells with thick and _______ walls and _______ ends.
Answer : Lignified, B-Tapering

42. On the basis of variation in form, structure and development sclerenchyma cells are of how many types ?
Answer : Two

43. The meristem that occurs in the mature region of roots and shoots of many plants particularly those that produce woody axis and appear later than primary meristem is called.
Answer : Secondary meristem

44. The structure(s) which is derived from shoot apical meristem and present in axil (s) of leaf (leaves) and are capable of forming a branch or a flower, called _______ .
Answer : Axillary bud

45. Which type of vascular bundles are found in roots?
Answer : Radial

46. At some places, the cambium forms a narrow bands of _______ which passes through the secondary xylem and the secondary phloem in the radial directions. These are the _______
Answer : Parenchyma, Secondary Medullary rays

47. Which type of sclerenchyma cells are found in the fruit wall of nuts, pulp of fruits like guava, pear and sapota, seed coats of legumes and leaves of tea.
Answer : Sclereids

48. Which simple permanent tissue forms the major component with in plant organs ?
Answer : Parenchyma

49. Phloem fibre are made up of _______ cells. These are generally absent in the _______
Answer : Sclerenchymatous, Primary Phloem

50. Which simple tissue performs various functions like photosynthesis secretion and storage ?
Answer : Parenchyma

51. _______ is impervious to water due to _______ deposition in cell wall.
Answer : Phellem/cork , suberin

52. The enteronephric nephridia of earthworm are mainly concerned with ______________
Answer : Excretion of nitrogenus wastes

53. A mature sieve element possesses a peripheral cytoplasm and a large _______ but lacks a _______
Answer : Vacuole, , Nucleus

54. List of some of the structural part is given below :Pericycle, Pith vascular bundles and medullary rays Which is not a part of stele in the primary internal structure of dicotyledonae and monocotyledonae roots.
Answer : Medullary rays

55. Which xylem element store food material in the form of starch or fats and other substances like tannin?
Answer : Xylem Parenchyma

56. Phellem, phellogen and _______ are collectivety termed as _______
Answer : Phelloderrn or secondary cortex Periderm

57. Phloem elements which are long, tube-like structures, arranged longitudinally and are associated with the companion cells.
Answer : Sieve tube elements.

58. In dicot stem the cells of carnbium present between primary xylem and primary phloem is the _______ cambium.
Answer : Intra fascicular,

59. The term meristem is derived from _______ word meristos, which means _______
Answer : Greek , Divided

60. The _______ venation in _______ leaves is reflected in the near similar sizes of vascular bundles (except in main veins) as seen in vertical section of the leaves.
Answer : Parallel,Monocot

61. In dicotyledonae stem, which layer is also termed as starch sheath?
Answer : Endodermis

62. Permanent tissues which are made up of more than one type of cells and these cells work together as a unit
Answer : Complex tissues

NEET-Biology-4-Anatomy of Flowering Plants-2

  August 10, 2020   ,   Edit
21. The functions of _______ are controlled by the _______ of companion cells.
Answer : Sieve tubes, Nucleus

22. In earthworm and cockroach which type of structure is common :-
Answer : Ventral nerve cord

23. In dlicots, guard cells are _______ shaped whereas in grasses guard cells are _______ shaped
Answer : bean,dumb-bell

24. The cross section of a plant material shows the following anatomical features under microscope: (a) usually more than six xylem bundles with exarch xylem (b) pith is large and well developed (c) Radial arrangement of xylem and phloem bundles. The plant material should be :
Answer : Monocotyledonous root

25. Study of internal structure of plants is called_______
Answer : Plant Anatomy

26. In a isobilateral leaf, two distinct patches of _______ are present above and below of each large _______ which extend towards upper and lower epidermis, respectively.
Answer : Sclerenchyma,Vascular bundle

27. Spermatophytes in which phloem have albuminous cells and sieve cells.
Answer : Gymnosperms

28. The presence of vessels in xylem is characteristics feature of _______
Answer : Angiosperms

29. _______ in plants is largely restricted to specialised regions of active cell division, called _______
Answer : Growth , Meristem

30. Plant group in which phloem is composed of sieve tube elements, companion cells, phloem parenchyma & Phloem fibres.
Answer : Angiosperms

31. All tissues except _______ and _______ constitute the ground tissue System.
Answer : Epidermis , Vascular bundles

32. Which xylem element have highly thickned walls and obliterated central lumen
Answer : Xylem fibre

33. In grasses, certain _______ epidermal cells along the veins modify themselves into large, empty, colourless cells. These cells are called _______ cells.
Answer : Adaxial,Bulliform

34. The meristem which occur in grasses between mature tissues and regenerate parts removed by grazing herbivores is known as _______
Answer : Intercalary meristem

35. The meristem which occurs at the tips of roots and shoots and produce primary tissues are called
Answer : Apical meristems

36. Which simple permanent tissue provides mechanical support to the growing parts of plant such as young stem and petiole of a leaf.
Answer : Collenchyma

37. Which simple permanent tissue consists of long narrow cells with thick and lignified walls having a few or numerous pits.
Answer : Sclerenchyma

38. _______ Both _______ and intercalary meristems are _______ meristems and contribute to the formation of the primary plant body.
Answer : Apical, meristem , Primary

39. Cells are generally isodiametric.Cells may be spherical, oval, rounded, polygonal or elongated in shape.Their walls are thin and made up of cellulose. The cells may either be closely packed or have intercellular spaces. Above characters of cells related to which type of simple permanent tissue?
Answer : Parenchyma

40. in the internal structure of roots, casparian strips are present in :-
Answer : Endodermis

NEET-Biology-4-Anatomy of Flowering Plants-1

  August 10, 2020   ,   Edit
1. In a dorsiventral leaf, palisade parenchyma lies towards _______ and spongy parenchyma lies towards _______ in position.
Answer : Adaxial, Abaxial

2. The root hairs are _______ elongations of the _______ cells and help absorb water and minerals from the soil.
Answer : Unicellular,Epidermal

3. Blood is red but without RBCs. Such blood is found in _______ .
Answer : Earthworm

4. Heart wood comprises dead elements with highly _______ walls and it does not conduct water & minerals.
Answer : Lignified

5. _______ consists of cells which are much thickended at the corners due to the deposition of cellulose, hemicellulose and _______
Answer : Collenchyma, B-Pectin

6. Which type of vascular bundles are found in the primary internal structure of dicotyledonae stem (eg. Sunflower stem) ?
Answer : Conjoint, collateral & open

7. Epidermal cell are _______ with a small amount of _______ and large vacuole.
Answer : Parenchymatous,Cytoplasm

8. Name the lateral meristem which is responsible for the formation of phellem and phelloderm.
Answer : Phellogen (Cork cambium)

9. _______ is a non-technical term that refers to all tissues exterior to _______ therefore including secondary phloem .
Answer : Bark,Vascular cambium

10. On the basis of their _______ and _______ there are three types of tissue systems.
Answer : Structure/morphology, Location/Position

11. The _______ wood is lighter in colour and exhibit low density whereas _______ wood is darker in colour and exhibit high density.
Answer : Spring,Autumn

12. In _______ the ground tissue consists of thin walled chloroplasts containing cells and is called _______
Answer : Leaves,Mesophyll

13. The stomatal aperture, guard cells and the surrounding subsidiary cells are together called _______
Answer : Stomatal apparatus

14. In the internal structure of sunflower stem, in between the vascular bundles there are a few layers of radially placed _______ cells, which constitute _______
Answer : Parenchymatous, -Medullary rays

15. Which tissue occurs in homogenous layers or in patches below the epidermis in stem of decotyledonous plants ?
Answer : Collenchyma

16. Which lateral meristem usually develops in cortical region of dicot stem?
Answer : Phellogen or cork cambium

17. List of some of meristems is given below : Fascicular vascular cambium , Inter fascicular cambium (C) Phellogen or cork cambium On the basis of location in plant body above meristems are placed in which group ?
Answer : Lateral meristem

18. _______ roots are endogenous in origin and originates from the cells of _______
Answer : Lateral, Pericycle

19. A group of cells having a common _______ and usually performing a common function, called_______
Answer : Origin , Tissue

20. Name the lateral meristem which is responsible for the formation of secondary xylem, secondary phloem and secondary medullary rays.
Answer : Vascular cambium

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