Which one of the following have vessels as their characteristic feature?
Angiosperms
Gymnosperms
Pteridophytes
Bryophytes
Correct Answer :
A. Angiosperms
The presence of vessels is a characteristic feature of angiosperms. Vessels help in conduction of water and dissolved salts form roots to the different parts of the shoot and provides mechanical support.
Related Questions
Which one of the following option shows the correct labelling of the parts marked as A, B, C and D in the given figure of a typical dicot root?
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
Tissues are classified into two main groups, namely meristematic and permanent tissues on the basis of
whether the cells being able to divide or not.
position of the cells.
whether they are living or dead.
none of the above
Read the following statements and answer the question.
- It has a sclerenchymatous hypodermis, a large number of scattered vascular bundles and a large parenchymatous ground tissue.
- Vascular bundles are conjoint and closed.
- Peripheral vascular bundles are generally smaller than the centrally located ones.
- Phloem parenchyma is absent, and water- containing cavities are present within the vascular bundles.
Which plant anatomy is being described by the above statements?
Dicotyledonous root
Monocotyledonous root
Dicotyledonous stem
Monocotyledonous stem
Xylem functions as a conducting tissue for water and minerals from _________to the ______and__________.
roots, stems, leaves
stems, roots, leaves
leaves, stems, roots
leaves, stems, leaves
The apical meristem of the root is present
in all the roots.
only in radicals.
only in tap roots.
only in adventitious roots.
T.S. of monocot leaf is given below, certain parts have been marked by alphabets (A G). Which one is the option showing there correct labelling?
A Adaxial epidermis, B Xylem, C Mesophyll, D Sub-stomatal cavity, E Abaxial epidermis, F Stoma, G Phloem
A Adaxial epidermis, B Abaxial epidermis, C Xylem, D Sub-stomatal cavity, E Stoma, F Mesophyll, G Phloem
A Adaxial epidermis, B Phloem, C Mesophyll, D Sub-stomatal cavity, E Abaxial epidermis, F Xylem, G Stoma
A Adaxial epidermis, B Xylem, C Stoma, D Substomatal cavity, E Abaxial epidermis, F Phloem, G Mesophyll
Why grafting is successful in dicots ?
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
Various functions like photosynthesis, storage, excretion performed by _____________.
sclerenchyma
parenchyma
collenchyma
aerenchyma
An organised and differentiated cellular structure having cytoplasm but no nucleus is called _________.
vessels
xylem parenchyma
sieve tubes
tracheids
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 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.
Match the elements of xylem given in column I with their character given in the column II and choose the correct option.
| Column-I | Column-II |
|---|---|
| A. Xylem vessels | I. Store food materials |
| B. Xylem tracheids | II. Obliterated lumen |
| C. Xylem fibres | III. Perforated plates |
| D. Xylem parenchyma | IV. Chisel-like ends |
A IV; B III; C II; D I
A III; B II; C I; D IV
A II; B I; C IV; D III
A III; B IV; C II; D I
Phellogen and phellem respectively denote
cork and cork cambium,
cork cambium and cork,
secondary cortex and cork,
cork and secondary cortex,
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.
One of the primary function of the ground tissue in a plant is
photosynthesis.
to protect the plant.
to anchor the plant.
water and sugar conduction.
A narrow layer of thin walled cells found between phloem/ bark and wood of a dicot is
cork cambium
vascular cambium
endodermis
both (a) & (c)
During the formation of leaves and elongation of stem, some cells left behind from the shoot apical meristem, constitute the
lateral meristem
axillary bud
cork cambium
fascicular cambium
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.
Tissue(s) present in an annual ring is/are
secondary xylem and phloem.
primary xylem and phloem.
secondary xylem only.
primary phloem and secondary xylem.
Sieve tubes are suited for translocation of food because they possess
bordered pits.
no ends walls.
broader lumen and perforated cross walls.
no protoplasm.
Which meristem helps in increasing girth?
Lateral meristem
Intercalary meristem
Primary meristem
Apical meristem
T.S. of dicot stem is given below, certain parts have been marked by alphabets (A I). Choose the option which shows their correct labelling.
A Epidermis, B Epidermal hair, C Parenchyma, D Starch sheath, E Hypodermis (collenchyma), F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays
A Epidermal hair, B Epidermis, C Hypodermis (collenchyma), D Parenchyma, E Endoderm is (Starch Sheath), F Pericycle, G Vascular bundle, H Medullary rays, I Medulla or pith
A Epidermal hair, B Epidermis, C Hypodermis (collenchyma), D Starch sheath, E Parenchyma, F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays
A Epidermal hair, B Epidermis, C Parenchyma, D Hypodermis (collenchyma), E Starch sheath, F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays
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
Which of following helps bamboo and grasses to elongate ?
Apical meristems
Lateral meristems
Secondary meristems
Intercalary meristems
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.
Sclerenchyma usually___________and_____________ protoplasts.
live, without
dead, with
live, with
dead, without
Bast fibres are made up of _____________cells.
sclerenchymatous
chlorenchymatous
parenchymatous
aerenchymatous
Cells of permanent tissues are specialized
functionally.
only structurally.
both structurally and functionally.
for mitosis.
Match the terms given in column I with their features given in column II and choose the correct option.
| 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)
Cork is formed from
phellogen
vascular cambium
phloem
xylem