286626
The chief water conducting elements of xylem in gymnosperms are:
1 vessels
2 fibres
3 transfusion tissue
4 tracheids
Explanation:
(d) Tracheids are chief water conducting elements of xylem in gymnosperms. They are devoid of protoplasm and hence dead. The wall constituting the tracheids is hard, thick and lignified. These are elongated cells with tapering ends.
Anatomy of Flowering Plants(NCERT)
286627
Which one of the following is not a lateral meristem?
1 Intrafascicular cambium
2 Interfascicular cambium
3 Phellogen
4 Intercalary meristem
Explanation:
(d) Meristem is divided on the basis of position in plant bodies into apical meristem, lateral meristem and intercalary meristem. Lateral meristem is present on the lateral sides, that is fascicular and interfascicular cambium and cork cambium (phellogen).
Anatomy of Flowering Plants(NCERT)
286628
Vessels are found in
1 all angiosperms and some gymnosperms
2 most of angiosperms and few gymnosperms
3 all angiosperms, all gymnosperms and some pteriodophyta
4 all pteridophyta
Explanation:
(b) Generally gymnosperms do not have vessels but a few gymnosperms with vessels are Ephedra, Smilax etc. Most of angiosperms have vessels except of few e.g., Trochodendron.
Anatomy of Flowering Plants(NCERT)
286629
Cork cambium and vascular cambium are
1 parts of secondary xylem and phloem
2 parts of pericycle
3 lateral meristems
4 apical meristems
Explanation:
(c) Cork cambium and vascular cambium are responsible for secondary growth which increases the girth of the stem. Therefore, they are considered as lateral meristems .
Anatomy of Flowering Plants(NCERT)
286630
Companion cells are closely associated with:
1 Sieve elements
2 Vessel elements
3 Trichomes
4 Guard cells
Explanation:
(a) Companion cells are narrow, elongated and thin walled living cells. They lie on the sides of the sieve tubes and are closely associated with them through compound plasmodesmata.
286626
The chief water conducting elements of xylem in gymnosperms are:
1 vessels
2 fibres
3 transfusion tissue
4 tracheids
Explanation:
(d) Tracheids are chief water conducting elements of xylem in gymnosperms. They are devoid of protoplasm and hence dead. The wall constituting the tracheids is hard, thick and lignified. These are elongated cells with tapering ends.
Anatomy of Flowering Plants(NCERT)
286627
Which one of the following is not a lateral meristem?
1 Intrafascicular cambium
2 Interfascicular cambium
3 Phellogen
4 Intercalary meristem
Explanation:
(d) Meristem is divided on the basis of position in plant bodies into apical meristem, lateral meristem and intercalary meristem. Lateral meristem is present on the lateral sides, that is fascicular and interfascicular cambium and cork cambium (phellogen).
Anatomy of Flowering Plants(NCERT)
286628
Vessels are found in
1 all angiosperms and some gymnosperms
2 most of angiosperms and few gymnosperms
3 all angiosperms, all gymnosperms and some pteriodophyta
4 all pteridophyta
Explanation:
(b) Generally gymnosperms do not have vessels but a few gymnosperms with vessels are Ephedra, Smilax etc. Most of angiosperms have vessels except of few e.g., Trochodendron.
Anatomy of Flowering Plants(NCERT)
286629
Cork cambium and vascular cambium are
1 parts of secondary xylem and phloem
2 parts of pericycle
3 lateral meristems
4 apical meristems
Explanation:
(c) Cork cambium and vascular cambium are responsible for secondary growth which increases the girth of the stem. Therefore, they are considered as lateral meristems .
Anatomy of Flowering Plants(NCERT)
286630
Companion cells are closely associated with:
1 Sieve elements
2 Vessel elements
3 Trichomes
4 Guard cells
Explanation:
(a) Companion cells are narrow, elongated and thin walled living cells. They lie on the sides of the sieve tubes and are closely associated with them through compound plasmodesmata.
286626
The chief water conducting elements of xylem in gymnosperms are:
1 vessels
2 fibres
3 transfusion tissue
4 tracheids
Explanation:
(d) Tracheids are chief water conducting elements of xylem in gymnosperms. They are devoid of protoplasm and hence dead. The wall constituting the tracheids is hard, thick and lignified. These are elongated cells with tapering ends.
Anatomy of Flowering Plants(NCERT)
286627
Which one of the following is not a lateral meristem?
1 Intrafascicular cambium
2 Interfascicular cambium
3 Phellogen
4 Intercalary meristem
Explanation:
(d) Meristem is divided on the basis of position in plant bodies into apical meristem, lateral meristem and intercalary meristem. Lateral meristem is present on the lateral sides, that is fascicular and interfascicular cambium and cork cambium (phellogen).
Anatomy of Flowering Plants(NCERT)
286628
Vessels are found in
1 all angiosperms and some gymnosperms
2 most of angiosperms and few gymnosperms
3 all angiosperms, all gymnosperms and some pteriodophyta
4 all pteridophyta
Explanation:
(b) Generally gymnosperms do not have vessels but a few gymnosperms with vessels are Ephedra, Smilax etc. Most of angiosperms have vessels except of few e.g., Trochodendron.
Anatomy of Flowering Plants(NCERT)
286629
Cork cambium and vascular cambium are
1 parts of secondary xylem and phloem
2 parts of pericycle
3 lateral meristems
4 apical meristems
Explanation:
(c) Cork cambium and vascular cambium are responsible for secondary growth which increases the girth of the stem. Therefore, they are considered as lateral meristems .
Anatomy of Flowering Plants(NCERT)
286630
Companion cells are closely associated with:
1 Sieve elements
2 Vessel elements
3 Trichomes
4 Guard cells
Explanation:
(a) Companion cells are narrow, elongated and thin walled living cells. They lie on the sides of the sieve tubes and are closely associated with them through compound plasmodesmata.
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Anatomy of Flowering Plants(NCERT)
286626
The chief water conducting elements of xylem in gymnosperms are:
1 vessels
2 fibres
3 transfusion tissue
4 tracheids
Explanation:
(d) Tracheids are chief water conducting elements of xylem in gymnosperms. They are devoid of protoplasm and hence dead. The wall constituting the tracheids is hard, thick and lignified. These are elongated cells with tapering ends.
Anatomy of Flowering Plants(NCERT)
286627
Which one of the following is not a lateral meristem?
1 Intrafascicular cambium
2 Interfascicular cambium
3 Phellogen
4 Intercalary meristem
Explanation:
(d) Meristem is divided on the basis of position in plant bodies into apical meristem, lateral meristem and intercalary meristem. Lateral meristem is present on the lateral sides, that is fascicular and interfascicular cambium and cork cambium (phellogen).
Anatomy of Flowering Plants(NCERT)
286628
Vessels are found in
1 all angiosperms and some gymnosperms
2 most of angiosperms and few gymnosperms
3 all angiosperms, all gymnosperms and some pteriodophyta
4 all pteridophyta
Explanation:
(b) Generally gymnosperms do not have vessels but a few gymnosperms with vessels are Ephedra, Smilax etc. Most of angiosperms have vessels except of few e.g., Trochodendron.
Anatomy of Flowering Plants(NCERT)
286629
Cork cambium and vascular cambium are
1 parts of secondary xylem and phloem
2 parts of pericycle
3 lateral meristems
4 apical meristems
Explanation:
(c) Cork cambium and vascular cambium are responsible for secondary growth which increases the girth of the stem. Therefore, they are considered as lateral meristems .
Anatomy of Flowering Plants(NCERT)
286630
Companion cells are closely associated with:
1 Sieve elements
2 Vessel elements
3 Trichomes
4 Guard cells
Explanation:
(a) Companion cells are narrow, elongated and thin walled living cells. They lie on the sides of the sieve tubes and are closely associated with them through compound plasmodesmata.
286626
The chief water conducting elements of xylem in gymnosperms are:
1 vessels
2 fibres
3 transfusion tissue
4 tracheids
Explanation:
(d) Tracheids are chief water conducting elements of xylem in gymnosperms. They are devoid of protoplasm and hence dead. The wall constituting the tracheids is hard, thick and lignified. These are elongated cells with tapering ends.
Anatomy of Flowering Plants(NCERT)
286627
Which one of the following is not a lateral meristem?
1 Intrafascicular cambium
2 Interfascicular cambium
3 Phellogen
4 Intercalary meristem
Explanation:
(d) Meristem is divided on the basis of position in plant bodies into apical meristem, lateral meristem and intercalary meristem. Lateral meristem is present on the lateral sides, that is fascicular and interfascicular cambium and cork cambium (phellogen).
Anatomy of Flowering Plants(NCERT)
286628
Vessels are found in
1 all angiosperms and some gymnosperms
2 most of angiosperms and few gymnosperms
3 all angiosperms, all gymnosperms and some pteriodophyta
4 all pteridophyta
Explanation:
(b) Generally gymnosperms do not have vessels but a few gymnosperms with vessels are Ephedra, Smilax etc. Most of angiosperms have vessels except of few e.g., Trochodendron.
Anatomy of Flowering Plants(NCERT)
286629
Cork cambium and vascular cambium are
1 parts of secondary xylem and phloem
2 parts of pericycle
3 lateral meristems
4 apical meristems
Explanation:
(c) Cork cambium and vascular cambium are responsible for secondary growth which increases the girth of the stem. Therefore, they are considered as lateral meristems .
Anatomy of Flowering Plants(NCERT)
286630
Companion cells are closely associated with:
1 Sieve elements
2 Vessel elements
3 Trichomes
4 Guard cells
Explanation:
(a) Companion cells are narrow, elongated and thin walled living cells. They lie on the sides of the sieve tubes and are closely associated with them through compound plasmodesmata.