simple pits on their radial walls.
bordered pits on their lateral walls.
simple and bordered pits on their end walls.
simple perforation on their end walls.
D. simple perforation on their end walls.
Lenticels occur in most woody trees.
Sclerenchymatous cells are usually present in cortex.
The vascular tissue system is divided into three main zones- cortex, pericycle and pith.
The conjoint vascular bundles usually have the xylem located only on the outer side of the phloem.
similar in origin, but dissimilar in form and function.
dissimilar in origin, form and function.
dissimilar in origin, but similar in form and function.
similar in origin, form and function.
In dicots vascular bundles are arranged in a ring.
Dicots have cambium for secondary growth.
In dicots vessels with elements are arranged end to end.
Cork cambium is present in dicots
live, without
dead, with
live, with
dead, without
A
B
C
None of the above
they occur in the mature region of roots and shoots of many plants.
they made up of different kinds of tissues.
they involved in secondary growth.
they appear early in life of a plant and contribute to the formation of the primary plant body.
sapwood increases.
heartwood increase.
both sapwood and heartwood increases.
both sapwood and heartwood remains the same.
simple pits on their radial walls.
bordered pits on their lateral walls.
simple and bordered pits on their end walls.
simple perforation on their end walls.
Where companion cells helps in maintaining the pressure gradient in the sieve tubes.
Where plants absorb water through the roots and then give off water vapor through pores in their leaves.
Where activity of cork cambium builds pressure on the remaining layers peripheral to phellogen and ultimately these layers dies and slough off.
None of the above
in all the roots.
only in radicals.
only in tap roots.
only in adventitious roots.
Sap wood
Heart wood
Spring wood
Autumn wood
(iii) and (iv)
(i) and (ii)
(ii) and (iii)
(ii) and (iv)
sclerenchymatous
chlorenchymatous
parenchymatous
aerenchymatous
it gives rise to lateral branches.
it causes increase in girth.
it increases height and diameter of a plant.
it adds bulk to a plant.
A Phellem, B Phellogen, C Medullary rays, D Secondary xylem, E Secondary phloem, F Cambium ring
A Phellem, B Phellogen, C Medullary rays, D Secondary phloem, E Secondary xylem, F Cambium ring
A Phellogen, B Phellem, C Medullary rays, D Secondary xylem, E Secondary phloem, F Cambium ring
A Phellem, B Phellogen, C Cambium ring, D Secondary xylem, E Secondary phloem, F Medullary rays
soil is sandy.
there is climatic variation.
there is no marked climatic variation.
there is enough moisture in the atmosphere.
Dicotyledonous root
Monocotyledonous root
Dicotyledonous stem
Monocotyledonous stem
A Primary phloem, B Vascular cambium, C Secondary phloem, D Primary xylem
A Secondary phloem, B Vascular cambium, C Primary phloem, D Primary xylem
A Primary phloem, B Primary xylem, C Secondary phloem, D Vascular cambium
A Secondary phloem, B Primary xylem, C Primary phloem, D Vascular cambium
the parts of secondary xylem and phloem.
the parts of pericycle.
lateral meristems.
apical meristems.
size of leaf lamina at the node below each internode
intercalary meristem
shoot apical meristem
position of axillary buds
A Vascular structure, B Protoderm, C Root cap
A Cortex, B Endodermis, C Root cap
A Cortex, B Protoderm, C Root cap
A Tunica, B Protoderm, C Root cap
conjoint, collateral, open polyarch vascular bundle.
exodermis, endarch, tetrarch closed vascular bundles.
suberized exodermis, casparian strip, passage cells, cambium.
suberized exodermis, polyarch xylem, pith.
Angiosperms
Gymnosperms
Pteridophytes
Bryophytes
teak
mango
pine
palm
Column-I | Column-II |
---|---|
(Terms) | (Features) |
A. Fibres | (i) Cells are living and thin walled with cellulosic cell wall, store food materials in the form of starch or fat |
B. Sclereids | (ii) Main water conductive cells of the pteridophytes and the gymnosperms |
C. Tracheids | (iii) Thick walled, elongated and pointed cells, generally occurring in groups |
D. Vessels | (iv) Long cylindrical tube like structure and cells are devoid of protoplasm. Characteristic feature of angiosperms |
E. Xylem parenchyma | (v) Reduced form of sclerenchyma cells with highly thickened lignified cellular walls that form small bundles of durable layers of tissue in most plants. |
A - (i), B - (ii), C - (iii), D - (iv), E - (v)
A - (iii), B - (v), C - (ii), D - (iv), E - (i)
A - (iii), B - (i), C - (v), D - (ii), E - (iv)
A - (v), B - (iv), C - (iii), D - (i), E - (ii)
phloem
parenchyma
xylem
cambium
bordered pits.
no ends walls.
broader lumen and perforated cross walls.
no protoplasm.
Column -I | Column -II |
---|---|
A. Bulliform cells | I. Initiation of lateral roots |
B. Pericycle | II. Root |
C. Endarch xylem | III. Grasses |
D. Exarch xylem | IV. Dicot leaf |
E. Bundle sheath cells | V. Stem |
A III, B V, C IV, D I, E II
A II, B V, C I, D III, E IV
A II, B IV, C I, D III, E V
A III, B I, C V, D II, E IV
transpiration
guttation
gaseous exchange
both (a) & (c)
cork cambium
vascular cambium
endodermis
both (a) & (c)