Cork cambium and vascular cambium are
the parts of secondary xylem and phloem.
the parts of pericycle.
lateral meristems.
apical meristems.
Correct Answer :
C. lateral meristems.
Cork cambium and vascular cambium are lateral meristem. Lateral meristems are responsible for increase in thickness of the axis.
Related Questions
In land plants, the guard cells differ from other epidermal cells in having
cytoskeleton.
mitochondria.
endoplasmic reticulum.
chloroplasts.
Trees at sea do not have annual rings because
soil is sandy.
there is climatic variation.
there is no marked climatic variation.
there is enough moisture in the atmosphere.
An organised and differentiated cellular structure having cytoplasm but no nucleus is called _________.
vessels
xylem parenchyma
sieve tubes
tracheids
Match the followings and choose the correct option
| Column-I | Column-II |
|---|---|
| A. Cuticle | I. Guard cells |
| B. Bulliform cells | II. Outer layer |
| C. Stomata | III. Waxy layer |
| D. Epidermis | IV. Empty colourless cell |
A III, B IV, C I, D II
A I, B II, C III, D IV
A III, B II, C IV, D I
A III, B II, C I, D IV
Which one of the followings option shows the correct labelling of the parts marked as A, B, C and D in the given figure a lenticel?
A Epidermis, B Secondary cortex, C Cork cambium, D Cork
A Pore, B Cork cambium, C Secondary cortex, D Cork
A Pore, B Cork, C Complimentary cells, D Cork cambium
A Epidermis, B Complimentary cells, C Cork cambium, D Secondary cortex
Various functions like photosynthesis, storage, excretion performed by _____________.
sclerenchyma
parenchyma
collenchyma
aerenchyma
Which one of the following have vessels as their characteristic feature?
Angiosperms
Gymnosperms
Pteridophytes
Bryophytes
Cork is formed from
phellogen
vascular cambium
phloem
xylem
Which of the following is responsible for the formation of an embryonic shoot called axillary bud?
Lateral meristem
Apical meristem
Intercalary meristem
Both
A piece of wood having no vessels (trachea) must be belonged to
teak
mango
pine
palm
In the given figure of phloem tissue, identify the marked part (A, B and C) which help in maintaining the pressure gradient
in the sieve tubes.
A
B
C
None of the above
Which of the following statement(s) is/are correct ?
- Uneven thickening of cell wall is characteristic of sclerenchyma.
- Periblem forms cortex of the stem and the root.
- Tracheids are the chief water transporting elements in gymnosperms.
- Companion cell is devoid of nucleus at maturity.
- The commercial cork is obtained from Quercus suber.
(i) and (iv) only
(ii) and (v) only
(iii) and (iv) only
(ii), (iii) and (v) only
The vessel elements of angiosperms differ from other elements of xylem in having
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.
Cells of permanent tissues are specialized
functionally.
only structurally.
both structurally and functionally.
for mitosis.
Cork cambium and vascular cambium are
the parts of secondary xylem and phloem.
the parts of pericycle.
lateral meristems.
apical meristems.
In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden.
After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?
With the help of bulliform cells.
With the help of casparian strips.
With the help of vascular bundles.
With the help of stomatal apparatus.
The length of different internodes in a culm of sugarcane is variable because of
size of leaf lamina at the node below each internode
intercalary meristem
shoot apical meristem
position of axillary buds
A tissue is a group of cells which are
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.
Which type of plant tissue is being described by the given statements?
- It consists of long, narrow cells with thick and lignified cell walls having a few or numerous pits.
- They are dead and without protoplasts.
- On the basis of variation in form, structure, origin and development, it may be either fibres or sclereids.
- It provides mechanical support to organs.
Parenchyma
Sclerenchyma
Collenchyma
Chlorenchyma
In the given columns, column I contain structures of female reproductive system and column II contain its feature. Select the correct match.
| Column-I | Column-II |
|---|---|
| A. Lateral meristem | (i) Fascicular vascular cambium, interfascicular cambium and cork cambium. |
| B. Apical meristem | (ii) Produces dermal tissue, ground tissues and vascular tissue. |
| C. Bast fibres | (iii) Generally absent in primary phloem but found in secondary phloem. |
| D. Sap wood | (iv) Involved in the conduction of water and minerals from the root to leaf. |
A - (i), B - (ii), C - (iii), D - (iv)
A - (iii), B - (i), C - (ii), D - (iv)
A - (i), B - (iv), C - (iii), D - (ii)
A - (ii), B - (iv), C - (iii), D - (i)
A common structural feature of vessel elements and sieve tube elements are
pores on lateral walls.
presence of p-protein.
enucleate condition.
thick secondary walls.
The trees growing in desert will
show alternate rings of xylem and sclerenchyma.
have only conjunctive tissue and phloem is formed by the activity of cambium.
show distinct annual rings.
not show distinct annual rings.
Sclerenchyma usually___________and_____________ protoplasts.
live, without
dead, with
live, with
dead, without
Which of the following pair of match is not correct?
Pith - Large and well developed in monocotyledonous root.
Root hairs - Helps in preventing water loss due to transpiration
Sieve tube elements - Its functions are controlled by the nucleus of companion cells.
Stomatal apparatus - Consists of stomatal aperture, guard cells and surrounding subsidiary cells
Read the following statements and answer the question.
- Cambium is very active and produces a large number of xylary elements having vessels with wider cavities.
- It is also called early wood.
- It is lighter in colour and has lower density.
Which type of wood is described by the above statements?
Sap wood
Heart wood
Spring wood
Autumn wood
Identify the types of simple tissue indicated by A, B, C and D and their function.
A Parenchyma, Photosynthesis, Storage and Secretion.
B Sclerenchyma Scleriods; Transport food material
C Collenchyma; Provides mechanical support to organs.
D Sclerenchyma Fibres; Provide Mechanical support to the growing parts of the plant such as young stem and petiole of a leaf.
Some vascular bundles are described as open because these
are surrounded by pericycle but not endodermis.
are capable of producing secondary xylem and phloem.
possess conjunctive tissue between xylem and phloem.
are not surrounded by pericycle.
T.S. of dicot leaf passing through the midrib is given below. Certain parts have been marked by alphabets (A to H). Choose the option showing their correct labelling.
A Epidermis, B Spongy mesophyll, C Palisade mesophyll, D Stomata, E Guard cells, F Phloem, G Metaxylem, H Protoxylem
A Epidermis, B Palisade mesophyll, C Spongy mesophyll, D Sub-stomatal cavity, E Stoma, F Phloem, G Xylem, H Bundle sheath
A Epidermis, B Palisade mesophyll, C Spongy mesophyll, D Stomata, E Guard cells, F Epidermis, G Xylem, H Phloem
A Epidermis, C Palisade mesophyll, C Spongy mesophyll, D Stomata, E Guard cells, F Phloem, G Metaxylem, H Protoxylem
Which meristem helps in increasing girth?
Lateral meristem
Intercalary meristem
Primary meristem
Apical meristem
As secondary growth proceeds, in a dicot stem, the thickness of
sapwood increases.
heartwood increase.
both sapwood and heartwood increases.
both sapwood and heartwood remains the same.