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Class 11 Biology
Structural Organisation In Animals
Quiz 1
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Quiescent centre is present in the
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apical meristem
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shoot meristem
0%
lateral meristem
0%
root meristem
Explanation
root meristem
Closed vascular bundles lacks
0%
pith
0%
xylem
0%
cambium
0%
xylem vessels
Explanation
cambium
Which of the following is not a feature of spring wood?
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Color of the wood is light.
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Density is less.
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Cambium is active.
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Lesser number of xylary elements.
Explanation
Lesser number of xylary elements.
In a monocot leaf
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bulliform cells are absent from the eqidermis
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veins from a network
0%
mesophyll is well differentiated into palisade and spongy parenchyma
0%
mesophyll is not differentiated into palisade and spongy parenchyma
Explanation
mesophyll is not differentiated into palisade and spongy parenchyma
A. T. S. of a young dicot root can be distinguished from that of a young dicot stem by the presence of
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radial arrangement of xylem and phloem
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collateral arrangement of xylem and phloem
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interfascicular cambium
0%
intrafascicular cambium
Explanation
radial arrangement of xylem and phloem
Fusifrom initial cells of cambium from
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vascular rays
0%
tracheary elements
0%
ray parenchyma
0%
phloem parenchyma
Explanation
tracheary elements
Callose deposition is found in
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tracheids
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companion cells
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sieve areas
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phloem parenchyma
Explanation
sieve areas
Stem develops from
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radicle
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cotyledon
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mesocarp
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plumule
Explanation
plumule
Stem grows in girth due to
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outer cortical
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epidermis
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vascular cambium
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phellogen
Explanation
vascular cambium
Which of the following is true about heartwood?
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They are dead but gives mechanical support to stem.
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They are light in color.
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They conduct water and minerals.
0%
1 and 3
Explanation
They are dead but gives mechanical support to stem.
Pith is very well developed in
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monocot root and monocot srem
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monocot root and dicot root
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dicot root and monocot stem
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monocot root and dicot stem
Explanation
monocot root and dicot stem
Which of the following helps in the curling of the leaf surface?
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Bulliform cells
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Xylem tissue
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Palisade parenchyma
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Bundle sheath cells
Explanation
Bulliform cells
Walls of sclerenchyma are
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rigid
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lignified
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pectinised
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suberised
Explanation
lignified
After the secondary growth, the oldest layer of secondary phloem in a dicot stem is located
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just outside the vascular cambium
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just inside the vascular cambium
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just inside the vascular phloem
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just outside the secondary xylem
Explanation
just inside the vascular phloem
The innermost layer of cortex which shows casparian thickenings in its cells is called as
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epidermis
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endodermis
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pericycle
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exodermis
Explanation
endodermis
Vessels differ from tracheids
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in being living
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in being derived from a single cell
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in that they consist of vertical row of cells with cross walls dissolved
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in coducting water and minerals
Explanation
in that they consist of vertical row of cells with cross walls dissolved
Endodermis cells are rich in
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cellulose
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starch grains
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fibers
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resins and wax
Explanation
starch grains
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