Exp:B Tracheid differs from vessels in having 'bordered pits'. Tracheids are made up of single cells, whereas vessels are made up of a group of cells. Tracheids are found in all vascular plant but vessels are only seen in angiosperms, tracheids are found less large pits while vessels are found large small pits. Bordered pits are structures found in the conductive tissues of many plants. The tracheids, which transport liquids, are dead cells.
Rajasthan PMT-2000
Anatomy of Flowering Plants
271619
As compared to sclerenchyma, parenchyma does not function in:
1 gas exchange
2 nutrient transport
3 mechanical support
4 support and gas exchange
Explanation:
Exp:C As compared to sclerenchyma, parenchyma does not function in 'mechanical support', parenchyma has loosely packed cells that contain intercellular spaces. They store and assimilate food, they serve as a food storage tissue. Parenchyma is a permanent tissue helps in storing food in plants. Sclerenchyma provides mechanical strength. These cells are usually found associated with other cells types and give them mechanical support. Sclerenchyma is an example of a simple permanent but dead mechanical tissue. It has a cell wall that is made up of cellulose and lignin. It provides mechanical support to the plants.
AP EAMCET-1999
Anatomy of Flowering Plants
271620
The stele, in the root of the following is tetrarch:
1 Nicotiana
2 Helianthus
3 Gossypium
4 Trapa
Explanation:
Exp:C The stele, in the root of 'Gossypium' is tetrarch, based on the number of xylem strands present in the stele, it can be different types in vascular tissue or the stele consists of three tissues, the pericycle, the xylem and also the phloem. In 'Gossypium' the tetrarch stele is found. Tetrarch stele is a stele which contain the 4 xylem strands.
AP EAMCET-1999
Anatomy of Flowering Plants
271626
Compare the statement \(A\) and \(B\) Statement A : Sclerenchyma cells do not have plasmodesmata Statement B : The cell walls of some permanent tissues are heavily lignified. Select the correct description :
1 Both the statements A and B are wrong
2 Statement A is correct and B is wrong
3 Statement A is wrong and B is correct
4 Both the statements A and B are correct
Explanation:
Exp:D Sclerenchyma cells do not have plasmodesmata because they are thick and dead cells. So, there is no need for plasmodesmata in dead cells as cell to cell communication does not take place in dead cells. Parenchyma, collenchyma and sclerenchyma are types of permament tissues in which sclerenchyma is heavily lignified.
Exp:B Tracheid differs from vessels in having 'bordered pits'. Tracheids are made up of single cells, whereas vessels are made up of a group of cells. Tracheids are found in all vascular plant but vessels are only seen in angiosperms, tracheids are found less large pits while vessels are found large small pits. Bordered pits are structures found in the conductive tissues of many plants. The tracheids, which transport liquids, are dead cells.
Rajasthan PMT-2000
Anatomy of Flowering Plants
271619
As compared to sclerenchyma, parenchyma does not function in:
1 gas exchange
2 nutrient transport
3 mechanical support
4 support and gas exchange
Explanation:
Exp:C As compared to sclerenchyma, parenchyma does not function in 'mechanical support', parenchyma has loosely packed cells that contain intercellular spaces. They store and assimilate food, they serve as a food storage tissue. Parenchyma is a permanent tissue helps in storing food in plants. Sclerenchyma provides mechanical strength. These cells are usually found associated with other cells types and give them mechanical support. Sclerenchyma is an example of a simple permanent but dead mechanical tissue. It has a cell wall that is made up of cellulose and lignin. It provides mechanical support to the plants.
AP EAMCET-1999
Anatomy of Flowering Plants
271620
The stele, in the root of the following is tetrarch:
1 Nicotiana
2 Helianthus
3 Gossypium
4 Trapa
Explanation:
Exp:C The stele, in the root of 'Gossypium' is tetrarch, based on the number of xylem strands present in the stele, it can be different types in vascular tissue or the stele consists of three tissues, the pericycle, the xylem and also the phloem. In 'Gossypium' the tetrarch stele is found. Tetrarch stele is a stele which contain the 4 xylem strands.
AP EAMCET-1999
Anatomy of Flowering Plants
271626
Compare the statement \(A\) and \(B\) Statement A : Sclerenchyma cells do not have plasmodesmata Statement B : The cell walls of some permanent tissues are heavily lignified. Select the correct description :
1 Both the statements A and B are wrong
2 Statement A is correct and B is wrong
3 Statement A is wrong and B is correct
4 Both the statements A and B are correct
Explanation:
Exp:D Sclerenchyma cells do not have plasmodesmata because they are thick and dead cells. So, there is no need for plasmodesmata in dead cells as cell to cell communication does not take place in dead cells. Parenchyma, collenchyma and sclerenchyma are types of permament tissues in which sclerenchyma is heavily lignified.
Exp:B Tracheid differs from vessels in having 'bordered pits'. Tracheids are made up of single cells, whereas vessels are made up of a group of cells. Tracheids are found in all vascular plant but vessels are only seen in angiosperms, tracheids are found less large pits while vessels are found large small pits. Bordered pits are structures found in the conductive tissues of many plants. The tracheids, which transport liquids, are dead cells.
Rajasthan PMT-2000
Anatomy of Flowering Plants
271619
As compared to sclerenchyma, parenchyma does not function in:
1 gas exchange
2 nutrient transport
3 mechanical support
4 support and gas exchange
Explanation:
Exp:C As compared to sclerenchyma, parenchyma does not function in 'mechanical support', parenchyma has loosely packed cells that contain intercellular spaces. They store and assimilate food, they serve as a food storage tissue. Parenchyma is a permanent tissue helps in storing food in plants. Sclerenchyma provides mechanical strength. These cells are usually found associated with other cells types and give them mechanical support. Sclerenchyma is an example of a simple permanent but dead mechanical tissue. It has a cell wall that is made up of cellulose and lignin. It provides mechanical support to the plants.
AP EAMCET-1999
Anatomy of Flowering Plants
271620
The stele, in the root of the following is tetrarch:
1 Nicotiana
2 Helianthus
3 Gossypium
4 Trapa
Explanation:
Exp:C The stele, in the root of 'Gossypium' is tetrarch, based on the number of xylem strands present in the stele, it can be different types in vascular tissue or the stele consists of three tissues, the pericycle, the xylem and also the phloem. In 'Gossypium' the tetrarch stele is found. Tetrarch stele is a stele which contain the 4 xylem strands.
AP EAMCET-1999
Anatomy of Flowering Plants
271626
Compare the statement \(A\) and \(B\) Statement A : Sclerenchyma cells do not have plasmodesmata Statement B : The cell walls of some permanent tissues are heavily lignified. Select the correct description :
1 Both the statements A and B are wrong
2 Statement A is correct and B is wrong
3 Statement A is wrong and B is correct
4 Both the statements A and B are correct
Explanation:
Exp:D Sclerenchyma cells do not have plasmodesmata because they are thick and dead cells. So, there is no need for plasmodesmata in dead cells as cell to cell communication does not take place in dead cells. Parenchyma, collenchyma and sclerenchyma are types of permament tissues in which sclerenchyma is heavily lignified.
Exp:B Tracheid differs from vessels in having 'bordered pits'. Tracheids are made up of single cells, whereas vessels are made up of a group of cells. Tracheids are found in all vascular plant but vessels are only seen in angiosperms, tracheids are found less large pits while vessels are found large small pits. Bordered pits are structures found in the conductive tissues of many plants. The tracheids, which transport liquids, are dead cells.
Rajasthan PMT-2000
Anatomy of Flowering Plants
271619
As compared to sclerenchyma, parenchyma does not function in:
1 gas exchange
2 nutrient transport
3 mechanical support
4 support and gas exchange
Explanation:
Exp:C As compared to sclerenchyma, parenchyma does not function in 'mechanical support', parenchyma has loosely packed cells that contain intercellular spaces. They store and assimilate food, they serve as a food storage tissue. Parenchyma is a permanent tissue helps in storing food in plants. Sclerenchyma provides mechanical strength. These cells are usually found associated with other cells types and give them mechanical support. Sclerenchyma is an example of a simple permanent but dead mechanical tissue. It has a cell wall that is made up of cellulose and lignin. It provides mechanical support to the plants.
AP EAMCET-1999
Anatomy of Flowering Plants
271620
The stele, in the root of the following is tetrarch:
1 Nicotiana
2 Helianthus
3 Gossypium
4 Trapa
Explanation:
Exp:C The stele, in the root of 'Gossypium' is tetrarch, based on the number of xylem strands present in the stele, it can be different types in vascular tissue or the stele consists of three tissues, the pericycle, the xylem and also the phloem. In 'Gossypium' the tetrarch stele is found. Tetrarch stele is a stele which contain the 4 xylem strands.
AP EAMCET-1999
Anatomy of Flowering Plants
271626
Compare the statement \(A\) and \(B\) Statement A : Sclerenchyma cells do not have plasmodesmata Statement B : The cell walls of some permanent tissues are heavily lignified. Select the correct description :
1 Both the statements A and B are wrong
2 Statement A is correct and B is wrong
3 Statement A is wrong and B is correct
4 Both the statements A and B are correct
Explanation:
Exp:D Sclerenchyma cells do not have plasmodesmata because they are thick and dead cells. So, there is no need for plasmodesmata in dead cells as cell to cell communication does not take place in dead cells. Parenchyma, collenchyma and sclerenchyma are types of permament tissues in which sclerenchyma is heavily lignified.
