CBSE Questions for Class 11 Medical Biology Anatomy Of Flowering Plants Quiz 15 - MCQExams.com

Removal of ring bark would finally lead to death of plant due to
  • Absence of transport of minerals
  • Absence of transport of organic solute to roots
  • Death of stem
  • Absence of water translocation
Secondary growth is not found in
  • Dracaena
  • Cucurbita
  • Bambusa
  • Both B and C
In the diagram of section of root of maize, different parts have been indicated by alphabets. Choose the correct answer.
216125_b0c62e3d45124291b09a7a6fbd79bec0.png
  • A- Phloem, B- Xylem, C- Cortex, D- Endodermis, E- Pith, F- Root hair, G- Epidermis
  • A- Pith, B- Root hair, C- Epiblema, D- Cork, D- Cortex, E- Endodermis, F- Phloem, G- Xylem
  • A- Root hair, B- Epiblema, C- Cortex, D- Endodermis, E- Pith, F- Xylem, G- Phloem
  • A- Epiblema, B- Root hair, C- Vascular bundle, D- Cortex, E- Phloem, F- Xylem, G- Pith
A nectar-secreting gland cell characterstically contains
  • Granular cytoplasm filling the cell and a small nucleus
  • Granular cytoplasm leaving a central vacuole and a small nucleus
  • Granular cytoplasm filling the cell and a large conspicuous nucleus
  • Vacuolated cytoplasm but with a large nucleus
Three types of tissue systems namely epidermal, fundamental, & vascular, were proposed by
  • Hanstein
  • Buvat
  • Sachs
  • Nageli
Transverse section of a material exhibits conjoint collateral endarch and closed bundles scattered in a ground tissue, what should be the material?
  • Monocot root
  • Dicot root
  • Monocot stem
  • Dicot stem
Long pointed sclerenchyma cells are called
  • Fibres.
  • Tracheae.
  • Wood parenchyma.
  • Sclereids.
The diagram above is a three-dimensional representation of a cell found in many herbaceous plants.
Which one of the following descriptions applies to the cell shown above?

226460_2ab4ea0237fb491884253a43ada53aad.png
  • A xylem vessel, produced during secondary thickening
  • A phellogen cell with a thickened wall
  • An endodermal cell with Casparian strips
  • An immature sclerenchymatous fiber
How many histogens are present in monocot root apex?
  • 1
  • 2
  • 3
  • 4
Passage cells are more distinct in endodermis of
  • Dicot stem
  • Monocot stem
  • Dicot root
  • Monocot root
Bast fibres are mostly found in
  • Secondary xylem
  • Secondary phloem
  • Primary phloem
  • Primary xylem
Sclerenchymatous cells have large percentage of-------------------- in their cell walls.
  • Cellulose
  • Pectin
  • Lignin
  • Silica
Three or less than six radial vascular bundles are present in
  • Monocot stem
  • Dicot stem
  • Monocot root
  • Dicot root
How many types of cells are present in vascular cambium
  • Two types, fusiform and ray initial
  • Only fusiform intial
  • Only ray initial
  • Three types fusiform, ray and medullary rays
Stem of date palm increases in girth due to activity of:
  • Intercalary meristem
  • Apical meristem
  • Lateral meristem
  • None of the above
Gymnosperm wood is non porous, because it
  • Lacks vessels
  • Contains tracheae
  • Has abundant fibres
  • Contains no fibres
Secondary growth is the production of
  • New tissues from intercalary meristem
  • New conduction cells
  • New tissues from lateral meristem
  • New ground cells
Protective layer found at the site of abscission is
  • Parenchymatous
  • Collenchymatous
  • Sclerenchymatous
  • Suberized
The commercial cork is obtained from 
  • Quercus suber
  • Calotropis
  • Pine
  • Peepal
Successive ring of vascular cambium is found in 
(a) Cycas stem
(b) Gnetum stem
(c) Pinus stem
(d) Sunflower stem
  • Only a, b and c are correct
  • Both (a) and (b) are correct
  • Both (b) and (d) are correct
  • Both (a) and (c) are correct
Cambium cells divide in which of the following plane?
  • Tangential
  • Radial
  • Oblique
  • Anticlinal
Function of cork cambium is to produce
  • Secondary xylem and secondary phloem
  • Cork and secondary cortex
  • Secondary phloem and secondary cortex
  • Cork
Tunica corpus theory was given by
  • Schmidt
  • Hanstein
  • Nageli
  • Schuessler
Vessels are found in
  • All angiosperms and some gymnosperm
  • Most of the angiosperms and few gymnosperms
  • All angiosperms, all gymnosperms and some pteridophyta
  • All pteridophyta
The sap wood is converted into heartwood by which of the following method?
  • By degeneration of protoplast of living cells
  • Tyloses formation
  • By deposition of resins, oil, gums etc
  • All of the above
A bundle having phloem on either side of xylem is
  • Bicollateral
  • Collateral
  • Radial
  • Concentric
Periderm includes
  • Phellem
  • Phelloderm
  • Phellogen
  • Phellem, phelloderm and phellogen
In open collateral vascular bundle
  • Xylem and phloem are separated by cambium
  • Xylem and phloem lie side by side
  • Cambium occurs on the outside of bundle
  • Cambium does not occur in the bundle
The cells of the quiescent centre are characterized by
  • Having dense cytoplasm and prominent nuclei
  • Having light cytoplasm and small nuclei
  • Dividing regularly to add to the corpus
  • Dividing regularly to add to tunica
Lignin is a major component of cell wall of
  • Xylem
  • Phloem
  • Parenchyma
  • Cambium
Collateral, open vascular bundle and eustele is present in
  • Dicot stem
  • Monocot stem
  • Monocot root
  • Dicot Root
Lysigenous cavity and 'Y'-shaped xylem occurs in
  • Dicot stem
  • Monocot root
  • Monocot stem
  • Dicot root
Leaves of Victoria regia are rigid due to
  • Stellate parenchyma
  • Stellate sclerenchyma
  • Osteosclereids
  • Macrosclereids
Resin canals are 
  • Schizogenous
  • Lysogenous
  • Schizolysogenous
  • None of the above
Two cross-sections of stem and root appear similar, when viewed by naked eye. But under microscope, they can be differentiated by
  • Exarch condition of root and stem
  • Endarch condition of stem and root
  • Endarch condition of root and exarch condition stem
  • Endarch condition of stem and exarch condition of root
Atactostele is found in
  • Dicot stem
  • Monocot stem
  • Dicot root
  • Monocot root
T.S. of a material exhibits conjoint collateral endarch and closed bundles scattered in a ground tissue. What should be the material?
  • Monocot root
  • Dicot root
  • Monocot stem
  • Dicot stem
Tyloses are
  • Tracheal plugs which plugs with the lumen of the vessels and tracheids
  • Compound sieve plates
  • Specialized secretory cells
  • Laticiferous channels
Which of the following is not a characteristics of the anatomy of dicotyledonous roots?
  • Presence of little pith or absent
  • Radial vasular bundles
  • Presence of 15-20 vasuclar bundles
  • Secondary growth
Collenchymatous hypodermis is characteristic feature of
  • Dicot stem
  • Monoct stem
  • Monocot as well as dicot stem
  • Hydrophytes
Vascular bundles are found scattered in ground tissue, in
  • Maize stem
  • Sunflower stem
  • Gram root
  • Isobilateral leaf
Cork is an excellent material for making bottle stopper because it is
  • Cheap
  • Easily available
  • Air tight
  • Light
Intrafascicular cambium is situated
  • In between the vascular bundles
  • Inside the vascular bundles
  • Outside the vascular bundles
  • In pith
Complementary cells are formed by the activity of
  • Vascular cambium
  • Inter-fascicular ambium
  • Phellogen
  • Intra-fascicular cambium
Collateral, open vascular bundle and eustele is present in
  • Dicot stem
  • Monocot stem
  • Monocot root
  • Dicot root
Normally in dicot stems, phellogen develops from
  • Hypodermis
  • Phellem
  • Endodermal cells
  • Epidermal & pericycle cells
The hypodermis present in maize stem is:
  • Parenchymatous
  • Collenchymatous
  • Sclerenchymatous
  • Meristematic
Which of the following is not a character of dicot root?
  • Radial vascular bundle
  • Secondary growth
  • Pith less developed or absent
  • Vascular bundles $$15-20$$
Gymnosperms wood is non-porous because it
  • Lacks vessels
  • Contains tracheae
  • Has abundant fibres
  • Contains no fibres
Trees at seashore do not have annual rings because
  • There is climatic variation
  • There is no marked climatic variation
  • There is enough moisture in the atmosphere
  • Soil is sandy
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Practice Class 11 Medical Biology Quiz Questions and Answers