Anatomy of flowering plants MCQs with Answers

Question-1. Function of companion cells is

1. providing water to phloem
2. loading of sucrose into sieve elements by passive transport
3. providing energy to sieve elements for active transport
4. loading of sucrose into sieve elements

Question-2. In a longitudinal section of root, starting from the tip upward, the four zones occur in the 3 following order

1. root cap, cell division, cell maturation, cell enlargement
2. cell division, cell enlargement, cell maturation, root cap
3. cell division, cell maturation, cell enlargement, root cap
4. root cap, cell division, cell enlargement, cell maturation

Question-3. In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues?

1. Stem and root
2. Flowers, fruits and leaves
3. Shoot tips and root tips
4. All parts

Question-4. In endarch condition of xylem, protoxylem lies…............of metaxylem.

1. on outer side
2. both on inner and outer side
3. in centre
4. on inner side

Question-5. In land plants, the guard cells differ from other epidermal cells in having

1. mitochondria
2. cytoskeleton
3. endoplasmic reticulum
4. chloroplasts

Question-6. Loading of phloem is related to

1. elongation of phloem cell
2. separation of phloem parenchyma
3. strengthening of phloem fibre
4. increase of sugar in phloem

Question-7. Monocot leaves possess

1. lateral meristem
2. apical meristem
3. mass meristem
4. intercalary meristem

Question-8. Organization of stem apex into corpus and tunica is determined mainly by

1. regions of meristematic activity
2. rate of cell growth
3. rate of shoot tip growth
4. planes of cell division

Question-9. Out of diffuse porous and ring porous woods, which is correct?

1. Diffuse porous wood carries more water
2. Ring porous wood carries more water when need is higher
3. Diffuse porous wood is less specialized but conducts water rapidly through out
4. Ring porous wood, carries more water for short period

Question-10. Passage cells are thin walled cells found in

1. phloem elements that serve as entry points for substances for transport to other plant parts
2. testa of seeds to enable emergence of growing embryonic axis during seed germination
3. central region of style through which the pollen tube grows towards the ovary
4. endodermis of roots facilitating rapid transport of water from cortex to pericycle

Question-11. Pericycle of roots produces

1. lateral roots
2. vascular bundles
3. adventitious buds
4. mechanical support

Question-12. Periderm is produced by

1. fascicular cambium
2. phellogen
3. intrafascicular cambium
4. vascular cambium

Question-13. Phellogen and phellem respectively denote

1. cork and cork cambium
2. secondary cortex and cork
3. cork and secondary cortex
4. cork cambium and cork

Question-14. Procambium forms

1. only vascular cambium
2. only cork cambium
3. primary vascular bundles and vascular cambium
4. only primary vascular bundles

Question-15. Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of:

1. Hydrophytes
2. Xerophytes
3. Mesophytes
4. Epiphytes

Question-16. Some vascular bundles are described as open because these

1. Are surrounded by pericycle but no endodermis
2. Are capable of producing secondary xylem and phloem.
3. Possess conjunctive tissue between xylem and phloem.
4. Are not surrounded by pericycle

Question-17. The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is:

1. differentiating
2. maturing
3. elongating
4. widening

Question-18. The apical meristem of the root is present

1. only in radicals
2. only in tap roots
3. only in adventitious roots
4. in all the roots

Question-19. The cells of the quiescent centre are characterised by

1. having dense cytoplasm and prominent nuclei
2. having light cytoplasm and small nuclei
3. dividing regularly to add to the corpus
4. dividing regularly to add to tunica

Question-20. The chief water conducting elements of xylem in gymnosperms are

1. Fibres
2. Transfusion tissue
3. Tracheids
4. Vessels

Question-21. The common bottle cork is a product of

1. Vascular cambium
2. Dermatogen
3. Xylem
4. Phellogen

Question-22. The cork cambium, cork and secondary cortex are collectively called

1. phelloderm
2. phellogen
3. phellem
4. periderm

Question-23. The length of different internodes in a culm of sugarcane is variable because of

1. position of axillary buds
2. size of leaf lamina at the node below each internode
3. intercalary meristem
4. shoot apical meristem

Question-24. The quiescent centre in root meristem serves as a

1. region for absorption of water
2. reservoir of growth hormones
3. site for storage of food which is utilized during maturation.
4. reserve for replenishment of damaged cells of the meristem.

Question-25. Vascular cambium produces

1. secondary xylem and secondary phloem
2. primary xylem and secondary phloem
3. secondary xylem and primary phloem
4. primary xylem and primary phloem

Question-26. Vascular tissues in flowering plants develop from

1. plerome
2. periblem
3. dermatogen
4. phellogen

Question-27. Vessels are found in

1. most of angiosperms and few gymnosperms
2. all angiosperms and few gymnosperms and some pteridophytes
3. all pteridophytes
4. all angiosperms and some gymnosperms

Question-28. What happens during vascularization in plants?

1. Differentiation of procambium followed by the development of xylem and phloem
2. Differentiation of procambium, xylem and phloem is simultaneous
3. Differentiation of procambium followed by the development of primary phloem and then by primary xylem
4. Differentiation of procambium is immediately followed by the development of secondary xylem and phloem

Question-29. What is not true about sclereids?

1. These are elongated and flexible with tapered ends
2. These are commonly found in the shells of nuts and in the pulp of guava, pear etc
3. These are also called the stone cells
4. These are parenchyma cells with thickened lignified walls

Question-30. What is true about a monocot leaf?

1. Absence of bulliform cells from epidermis
2. Mesophyll not differentiated into palisade and spongy tissues
3. Well diffferentiated mesophyll
4. Reticulate venation

Question-31. Where do the Casparian bands occur?

1. Endodermis
2. Pericycle
3. Phloem
4. Epidermis

Question-32. Which exposed wood will decay faster?

1. Softwood
2. Wood with lot of fibres
3. Heartwood
4. Sapwood

Question-33. Which is correct about transport or conduction of substances?

1. Inorganic food moves upwardly and downwardly through xylem
2. Organic food moves up through phloem
3. Organic food moves up through phloem
4. Organic food moves upwardly and downwardly through phloem

Question-34. Which of the following does not have stomata ?

1. Mesophytes
2. Hydrophytes
3. None of these
4. Submerged hydrophytes

Question-35. Which of the following layer is present nearest of plasma membrane in plant cell?

1. Middle lamella
2. Secondary wall
3. Primary wall
4. Tonoplast

Question-36. Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem?

1. Interfascicular cambium
2. Intercalary meristem
3. Phellogen
4. Intrafascicular cambium

Question-37. Which of the following plant shows multiple epidermis?

1. Croton
2. Allium
3. Cucurbita
4. Nerium

Question-38. Which of the following statements is true?

1. Vessels are unicellular with wide lumen.
2. Tracheids are multicellular with narrow lumen
3. Vessels are multicellular with narrow lumen.
4. Tracheids are unicellular with wide lumen

Question-39. Which one of the following is not a lateral meristem?

1. Interfascicular cambium
2. Phellogen
3. Intercalary meristem
4. Intrafascicular cambium

Question-40. Y-shaped arrangement of xylem vessels is found in

1. monocot root
2. Both
3. None of these
4. monocot stem

Question-41. A bicollateral vascular bundle is characterised by

1. transverse splitting of vascular bundle
2. longitudinal splitting of vascular bundle
3. xylem being sandwitched between phloem
4. phloem being sandwitched between xylem

Question-42. A common structural feature of vessel elements and sieve tube elements are

1. presence of p-protein
2. enucleate condition
3. thick secondary walls
4. pores on lateral walls

Question-43. A leaf primordium grows into the adult leaf lamina by means of

1. lateral meristem
2. marginal meristem
3. at first by apical meristem and later largely by marginal meristem
4. apical meristem

Question-44. A narrow layer of thin walled cells found between phloem/ bark and wood of a dicot is

1. pericycle
2. cork cambium
3. endodermis
4. vascular cambium

Question-45. A vascular bundle in which the protoxylem is pointing to the periphery is called

1. closed
2. endarch
3. radial
4. exarch

Question-46. A.T.S. of a young dicot root can be distinguished from that of a young dicot stem by the presence of

1. collateral arrangement of xylem and phloem
2. interfascicular cambium
3. intrafascicular cambium
4. radial arrangement of xylem and phloem

Question-47. Abnormal/anomalous secondary growth occurs in

1. ginger
2. wheat
3. sunflower
4. Dracaena

Question-48. After the secondary growth, the oldest layer of secondary phloem in a dicot stem is located

1. just inside the vascular cambium
2. just inside the vascular phloem
3. just outside the secondary xylem
4. just outside the vascular cambium

Question-49. An organized and differentiated cellular structure having cytoplasm but no nucleus is

1. xylem parenchyma
2. sieve tubes
3. tracheids
4. vessels

Question-50. Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by:

1. Position of protoxylem
2. Absence of secondary xylem
3. Absence of secondary phloem
4. Presence of cortex

Question-51. Angular collenchyma occurs in

1. Tagetes
2. Althaea
3. Salvia
4. Cucurbita

Question-52. As the secondary growth takes place (proceeds) in a tree, thickness of

1. sapwood increases
2. both increase
3. both remain the same
4. heartwood increases

Question-53. At maturity which of the following is enucleate?

1. Companion cell
2. Palisade cell
3. Cortical cell
4. Sieve cell

Question-54. Bordered pits are found in

1. vessel wall
2. companion cells
3. sieve tube wall
4. sieve cells

Question-55. Callose deposition is found in

1. companion cells
2. sieve areas
3. phloem parenchyma
4. tracheids

Question-56. Chlorenchyma is known to develop in the

1. cytoplasm of Chlorella
2. mycelium of a green mould such as Aspergillus
3. spore capsule of a moss
4. pollen tube of Pinus

Question-57. Closed vascular bundles lacks

1. xylem
2. cambium
3. xylem vessels
4. pith

Question-58. Collenchyma differs from parenchyma in having

1. vacuoles
2. cellulose walls
3. living protoplasm
4. pectin deposits at corners

Question-59. Collenchyma occurs in the stem and petioles of

1. monocots
2. dicot herbs
3. hydrophytes
4. xerophytes

Question-60. Commercial cork is obtained from

1. Salix/Willow
2. Quercus/Oak
3. Betula/Birch
4. Berberis/Barberry

Question-61. Cork cambium and vascular cambium are

1. parts of pericycle
2. lateral meristems
3. apical meristems
4. parts of secondary xylem and phloem

Question-62. Endodermis cells are rich in

1. starch grains
2. fibers
3. resins and wax
4. cellulose

Question-63. Epidermis is absent in

1. ovule and seed
2. shoot bud and floral bud
3. petiole and pedice
4. root tip and shoot tip

Question-64. For a critical study of secondary growth in plants, which one of the following pairs is suitable?

1. Teak and pine
2. Deodar and fern
3. Wheat and maiden hair fern
4. Sugarcane and sunflower

Question-65. For union between stock and scion in grafting which one is the first to occur?

1. Production of plasmodesmata
2. Differentiation of new vascular tissues
3. Regeneration of cortex and epidermis
4. Formation of callus

Question-66. Four radial vascular bundles are found in

1. monocot root
2. dicot stem
3. monocot stem
4. dicot root

Question-67. Fusifrom initial cells of cambium from

1. tracheary elements
2. ray parenchyma
3. phloem parenchyma
4. vascular rays

Question-68. In a monocot leaf

1. veins from a network
2. mesophyll is well differentiated into palisade and spongy parenchyma
3. mesophyll is not differentiated into palisade and spongy parenchyma
4. bulliform cells are absent from the eqidermis

Question-69. Pith is very well developed in

1. monocot root and dicot root
2. dicot root and monocot stem
3. monocot root and dicot stem
4. monocot root and monocot srem

Question-70. Quiescent centre is present in the

1. shoot meristem
2. lateral meristem
3. root meristem
4. apical meristem

Question-71. Root hair arises from

1. endodermis
2. pericycle
3. cortex
4. epiblema

Question-72. Stem develops from

1. cotyledon
2. mesocarp
3. plumule
4. radicle

Question-73. Stem grows in girth due to

1. epidermis
2. vascular cambium
3. phellogen
4. outer cortical

Question-74. The innermost layer of cortex which shows casparian thickenings in its cells is called as

1. endodermis
2. pericycle
3. exodermis
4. epidermis

Question-75. Vessels differ from tracheids

1. in being derived from a single cell
2. in that they consist of vertical row of cells with cross walls dissolved
3. in coducting water and minerals
4. in being living

Question-76. Walls of sclerenchyma are

1. lignified
2. pectinised
3. suberised
4. rigid

Question-77. Which of the following helps in the curling of the leaf surface?

1. Xylem tissue
2. Palisade parenchyma
3. Bundle sheath cells
4. Bulliform cells

Question-78. Which of the following is not a feature of spring wood?

1. Density is less.
2. Cambium is active.
3. Lesser number of xylary elements.
4. Color of the wood is light.

Question-79. Which of the following is true about heartwood?

1. They are light in color.
2. They conduct water and minerals.
3. 1 and 3
4. They are dead but gives mechanical support to stem.