Anatomy of flowering plants MCQs with Answers

Question-1. Function of companion cells is

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

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

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

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

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

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

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

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

Question-6. Loading of phloem is related to

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

Question-7. Monocot leaves possess

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

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

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

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

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

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

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

Question-11. Pericycle of roots produces

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

Question-12. Periderm is produced by

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

Question-13. Phellogen and phellem respectively denote

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

Question-14. Procambium forms

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-25. Vascular cambium produces

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

Question-26. Vascular tissues in flowering plants develop from

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

Question-27. Vessels are found in

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

Question-28. What happens during vascularization in plants?

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

Question-29. What is not true about sclereids?

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

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

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

Question-31. Where do the Casparian bands occur?

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

Question-32. Which exposed wood will decay faster?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-41. A bicollateral vascular bundle is characterised by

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

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

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

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

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

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

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

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

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

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

Question-47. Abnormal/anomalous secondary growth occurs in

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

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

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

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

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

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

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

Question-51. Angular collenchyma occurs in

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

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

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

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

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

Question-54. Bordered pits are found in

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

Question-55. Callose deposition is found in

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

Question-56. Chlorenchyma is known to develop in the

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

Question-57. Closed vascular bundles lacks

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

Question-58. Collenchyma differs from parenchyma in having

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

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

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

Question-60. Commercial cork is obtained from

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

Question-61. Cork cambium and vascular cambium are

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

Question-62. Endodermis cells are rich in

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

Question-63. Epidermis is absent in

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

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

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

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

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

Question-66. Four radial vascular bundles are found in

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

Question-67. Fusifrom initial cells of cambium from

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

Question-68. In a monocot leaf

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

Question-69. Pith is very well developed in

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

Question-70. Quiescent centre is present in the

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

Question-71. Root hair arises from

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

Question-72. Stem develops from

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

Question-73. Stem grows in girth due to

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

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

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

Question-75. Vessels differ from tracheids

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

Question-76. Walls of sclerenchyma are

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

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

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

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

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

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

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