271681
Damaged sieve tubes are sealed by deposition of:
1 pectin
2 callus
3 suberin
4 lignin
Explanation:
Exp:B Damaged sieve tubes are sealed by deposition of callus. Lignin is an organic compound of high carbon content. The impregnation with lignin usually starts in the intercellular lamella and then spreads centripetally through the primary and secondary walls e.g., xylem cells. Pectic substances (protopectin, pectin, pectic acid) constitute the intercellular substance that binds together the wall of individual cells. Suberin occurs in association with cellulose in cork cells of periderm, endodermis and exodermis of many plants.
DUMET-2004
Anatomy of Flowering Plants
271682
In bicollateral vascular bundle the tissues found from out to inner side will be:
Exp:A Bicollateral vascular bundles have xylem and phloem present on the same radius and phloem is found on both the sides of xylem. Apart from phloem, vascular cambium is also present on both the sides of the xylem.
Rajasthan PMT-1997
Anatomy of Flowering Plants
271684
The term leptome is used for
1 xylem
2 phloem
3 endodermis
4 pericycle
Explanation:
Exp:B Term Leptome is used for phloem by Haberlandt. It has function similar to phloem is higher plants i.e. conduction of food material.
Rajasthan PMT-2003
Anatomy of Flowering Plants
271686
Angiospermic companion cell is associated with
1 sieve tube
2 vessels
3 tracheids
4 gymnospermic tracheids
Explanation:
Exp:A Companion cells are characteristic components of phloem tissue, which are closely associated with the sieve tubes (sieve elements) in the angiosperms. Both are linked ontogenically, as they originate from the same mother cell. The sieve tubes and companion cells maintain close cytoplasmic connections via plasmodesmata.
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Anatomy of Flowering Plants
271681
Damaged sieve tubes are sealed by deposition of:
1 pectin
2 callus
3 suberin
4 lignin
Explanation:
Exp:B Damaged sieve tubes are sealed by deposition of callus. Lignin is an organic compound of high carbon content. The impregnation with lignin usually starts in the intercellular lamella and then spreads centripetally through the primary and secondary walls e.g., xylem cells. Pectic substances (protopectin, pectin, pectic acid) constitute the intercellular substance that binds together the wall of individual cells. Suberin occurs in association with cellulose in cork cells of periderm, endodermis and exodermis of many plants.
DUMET-2004
Anatomy of Flowering Plants
271682
In bicollateral vascular bundle the tissues found from out to inner side will be:
Exp:A Bicollateral vascular bundles have xylem and phloem present on the same radius and phloem is found on both the sides of xylem. Apart from phloem, vascular cambium is also present on both the sides of the xylem.
Rajasthan PMT-1997
Anatomy of Flowering Plants
271684
The term leptome is used for
1 xylem
2 phloem
3 endodermis
4 pericycle
Explanation:
Exp:B Term Leptome is used for phloem by Haberlandt. It has function similar to phloem is higher plants i.e. conduction of food material.
Rajasthan PMT-2003
Anatomy of Flowering Plants
271686
Angiospermic companion cell is associated with
1 sieve tube
2 vessels
3 tracheids
4 gymnospermic tracheids
Explanation:
Exp:A Companion cells are characteristic components of phloem tissue, which are closely associated with the sieve tubes (sieve elements) in the angiosperms. Both are linked ontogenically, as they originate from the same mother cell. The sieve tubes and companion cells maintain close cytoplasmic connections via plasmodesmata.
271681
Damaged sieve tubes are sealed by deposition of:
1 pectin
2 callus
3 suberin
4 lignin
Explanation:
Exp:B Damaged sieve tubes are sealed by deposition of callus. Lignin is an organic compound of high carbon content. The impregnation with lignin usually starts in the intercellular lamella and then spreads centripetally through the primary and secondary walls e.g., xylem cells. Pectic substances (protopectin, pectin, pectic acid) constitute the intercellular substance that binds together the wall of individual cells. Suberin occurs in association with cellulose in cork cells of periderm, endodermis and exodermis of many plants.
DUMET-2004
Anatomy of Flowering Plants
271682
In bicollateral vascular bundle the tissues found from out to inner side will be:
Exp:A Bicollateral vascular bundles have xylem and phloem present on the same radius and phloem is found on both the sides of xylem. Apart from phloem, vascular cambium is also present on both the sides of the xylem.
Rajasthan PMT-1997
Anatomy of Flowering Plants
271684
The term leptome is used for
1 xylem
2 phloem
3 endodermis
4 pericycle
Explanation:
Exp:B Term Leptome is used for phloem by Haberlandt. It has function similar to phloem is higher plants i.e. conduction of food material.
Rajasthan PMT-2003
Anatomy of Flowering Plants
271686
Angiospermic companion cell is associated with
1 sieve tube
2 vessels
3 tracheids
4 gymnospermic tracheids
Explanation:
Exp:A Companion cells are characteristic components of phloem tissue, which are closely associated with the sieve tubes (sieve elements) in the angiosperms. Both are linked ontogenically, as they originate from the same mother cell. The sieve tubes and companion cells maintain close cytoplasmic connections via plasmodesmata.
271681
Damaged sieve tubes are sealed by deposition of:
1 pectin
2 callus
3 suberin
4 lignin
Explanation:
Exp:B Damaged sieve tubes are sealed by deposition of callus. Lignin is an organic compound of high carbon content. The impregnation with lignin usually starts in the intercellular lamella and then spreads centripetally through the primary and secondary walls e.g., xylem cells. Pectic substances (protopectin, pectin, pectic acid) constitute the intercellular substance that binds together the wall of individual cells. Suberin occurs in association with cellulose in cork cells of periderm, endodermis and exodermis of many plants.
DUMET-2004
Anatomy of Flowering Plants
271682
In bicollateral vascular bundle the tissues found from out to inner side will be:
Exp:A Bicollateral vascular bundles have xylem and phloem present on the same radius and phloem is found on both the sides of xylem. Apart from phloem, vascular cambium is also present on both the sides of the xylem.
Rajasthan PMT-1997
Anatomy of Flowering Plants
271684
The term leptome is used for
1 xylem
2 phloem
3 endodermis
4 pericycle
Explanation:
Exp:B Term Leptome is used for phloem by Haberlandt. It has function similar to phloem is higher plants i.e. conduction of food material.
Rajasthan PMT-2003
Anatomy of Flowering Plants
271686
Angiospermic companion cell is associated with
1 sieve tube
2 vessels
3 tracheids
4 gymnospermic tracheids
Explanation:
Exp:A Companion cells are characteristic components of phloem tissue, which are closely associated with the sieve tubes (sieve elements) in the angiosperms. Both are linked ontogenically, as they originate from the same mother cell. The sieve tubes and companion cells maintain close cytoplasmic connections via plasmodesmata.