NEET Test Series from KOTA - 10 Papers In MS WORD
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Anatomy of Flowering Plants
271705
Which of the following does not have stomata?
1 Hydrophytes
2 Mesophytes
3 Xerophytes
4 Submerged hydrophytes
Explanation:
Exp:D Submerged plants (e.g. Hydrilla, vallisneria, potamogeton do not have stomata, and they are dependent on epidermal cells to absorb all nutrients and gases that dissolved in water. In hydrophytes exchange of gases takes place directly by the plant body cells. - Such plants do not need stoma for this purpose. Hence underwater plants do not have stomata.
AFMC-2002
Anatomy of Flowering Plants
271709
Lenticels are involved in
1 Photosynthesis
2 Food transport
3 Conduction of water
4 Transpiration
5 Gaseous exchange
Explanation:
Exp: E Its function as a pore providing a pathway for the direct exchange of gases. Lenticles are involved in gaseous exchange lenticles is porus tissue consisting of cells with large intercellular space in the periderm of the secondary thickened organs and bark of woody stem of flowering plants.
Kerala PMT-2015
Anatomy of Flowering Plants
271711
In respect of many grasses, the presence of motor cells in the upper epidermis of leaves is to
1 increase the surface area of the leaf
2 store large amounts of water
3 check transpiration by reducing the surface area of the leaf
4 bear unicellular trichomes
Explanation:
Exp:C Bulliform cells or motor cells are large bubble shaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. - The upper epidermis typically has only about half the density of stomata that occur on the lower epidermis, so while transpiration does occur across the upper epidermis, not as much occurs as across the lower.
AMU-2011
Anatomy of Flowering Plants
271713
Stomatal opening or closing is due to
1 change in the turgidity of guard cells
2 the inner walls of each guard cells is thick and elastic
3 cellulose microfibrils of guard cells are oriented radially
4 All of the above
Explanation:
Exp:D The immediate cause of the opening or closing of stomata is a change in the turgidity of the guard cells. The inner wall of each guard cell, towards the pore or stomatal aperture, is thick and elastic. When turgidity increases within the two guard cells flanking each stomatal aperture or pore, the thin outer walls bulge out and force the inner walls into a crescent shape. The opening of the stoma is also aided due to the orientation of the microfibrils in the cell walls of the guard cells. Cellulose microfibrils are oriented radically rather than longitudinally making it easier for the stoma to open.
271705
Which of the following does not have stomata?
1 Hydrophytes
2 Mesophytes
3 Xerophytes
4 Submerged hydrophytes
Explanation:
Exp:D Submerged plants (e.g. Hydrilla, vallisneria, potamogeton do not have stomata, and they are dependent on epidermal cells to absorb all nutrients and gases that dissolved in water. In hydrophytes exchange of gases takes place directly by the plant body cells. - Such plants do not need stoma for this purpose. Hence underwater plants do not have stomata.
AFMC-2002
Anatomy of Flowering Plants
271709
Lenticels are involved in
1 Photosynthesis
2 Food transport
3 Conduction of water
4 Transpiration
5 Gaseous exchange
Explanation:
Exp: E Its function as a pore providing a pathway for the direct exchange of gases. Lenticles are involved in gaseous exchange lenticles is porus tissue consisting of cells with large intercellular space in the periderm of the secondary thickened organs and bark of woody stem of flowering plants.
Kerala PMT-2015
Anatomy of Flowering Plants
271711
In respect of many grasses, the presence of motor cells in the upper epidermis of leaves is to
1 increase the surface area of the leaf
2 store large amounts of water
3 check transpiration by reducing the surface area of the leaf
4 bear unicellular trichomes
Explanation:
Exp:C Bulliform cells or motor cells are large bubble shaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. - The upper epidermis typically has only about half the density of stomata that occur on the lower epidermis, so while transpiration does occur across the upper epidermis, not as much occurs as across the lower.
AMU-2011
Anatomy of Flowering Plants
271713
Stomatal opening or closing is due to
1 change in the turgidity of guard cells
2 the inner walls of each guard cells is thick and elastic
3 cellulose microfibrils of guard cells are oriented radially
4 All of the above
Explanation:
Exp:D The immediate cause of the opening or closing of stomata is a change in the turgidity of the guard cells. The inner wall of each guard cell, towards the pore or stomatal aperture, is thick and elastic. When turgidity increases within the two guard cells flanking each stomatal aperture or pore, the thin outer walls bulge out and force the inner walls into a crescent shape. The opening of the stoma is also aided due to the orientation of the microfibrils in the cell walls of the guard cells. Cellulose microfibrils are oriented radically rather than longitudinally making it easier for the stoma to open.
271705
Which of the following does not have stomata?
1 Hydrophytes
2 Mesophytes
3 Xerophytes
4 Submerged hydrophytes
Explanation:
Exp:D Submerged plants (e.g. Hydrilla, vallisneria, potamogeton do not have stomata, and they are dependent on epidermal cells to absorb all nutrients and gases that dissolved in water. In hydrophytes exchange of gases takes place directly by the plant body cells. - Such plants do not need stoma for this purpose. Hence underwater plants do not have stomata.
AFMC-2002
Anatomy of Flowering Plants
271709
Lenticels are involved in
1 Photosynthesis
2 Food transport
3 Conduction of water
4 Transpiration
5 Gaseous exchange
Explanation:
Exp: E Its function as a pore providing a pathway for the direct exchange of gases. Lenticles are involved in gaseous exchange lenticles is porus tissue consisting of cells with large intercellular space in the periderm of the secondary thickened organs and bark of woody stem of flowering plants.
Kerala PMT-2015
Anatomy of Flowering Plants
271711
In respect of many grasses, the presence of motor cells in the upper epidermis of leaves is to
1 increase the surface area of the leaf
2 store large amounts of water
3 check transpiration by reducing the surface area of the leaf
4 bear unicellular trichomes
Explanation:
Exp:C Bulliform cells or motor cells are large bubble shaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. - The upper epidermis typically has only about half the density of stomata that occur on the lower epidermis, so while transpiration does occur across the upper epidermis, not as much occurs as across the lower.
AMU-2011
Anatomy of Flowering Plants
271713
Stomatal opening or closing is due to
1 change in the turgidity of guard cells
2 the inner walls of each guard cells is thick and elastic
3 cellulose microfibrils of guard cells are oriented radially
4 All of the above
Explanation:
Exp:D The immediate cause of the opening or closing of stomata is a change in the turgidity of the guard cells. The inner wall of each guard cell, towards the pore or stomatal aperture, is thick and elastic. When turgidity increases within the two guard cells flanking each stomatal aperture or pore, the thin outer walls bulge out and force the inner walls into a crescent shape. The opening of the stoma is also aided due to the orientation of the microfibrils in the cell walls of the guard cells. Cellulose microfibrils are oriented radically rather than longitudinally making it easier for the stoma to open.
271705
Which of the following does not have stomata?
1 Hydrophytes
2 Mesophytes
3 Xerophytes
4 Submerged hydrophytes
Explanation:
Exp:D Submerged plants (e.g. Hydrilla, vallisneria, potamogeton do not have stomata, and they are dependent on epidermal cells to absorb all nutrients and gases that dissolved in water. In hydrophytes exchange of gases takes place directly by the plant body cells. - Such plants do not need stoma for this purpose. Hence underwater plants do not have stomata.
AFMC-2002
Anatomy of Flowering Plants
271709
Lenticels are involved in
1 Photosynthesis
2 Food transport
3 Conduction of water
4 Transpiration
5 Gaseous exchange
Explanation:
Exp: E Its function as a pore providing a pathway for the direct exchange of gases. Lenticles are involved in gaseous exchange lenticles is porus tissue consisting of cells with large intercellular space in the periderm of the secondary thickened organs and bark of woody stem of flowering plants.
Kerala PMT-2015
Anatomy of Flowering Plants
271711
In respect of many grasses, the presence of motor cells in the upper epidermis of leaves is to
1 increase the surface area of the leaf
2 store large amounts of water
3 check transpiration by reducing the surface area of the leaf
4 bear unicellular trichomes
Explanation:
Exp:C Bulliform cells or motor cells are large bubble shaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. - The upper epidermis typically has only about half the density of stomata that occur on the lower epidermis, so while transpiration does occur across the upper epidermis, not as much occurs as across the lower.
AMU-2011
Anatomy of Flowering Plants
271713
Stomatal opening or closing is due to
1 change in the turgidity of guard cells
2 the inner walls of each guard cells is thick and elastic
3 cellulose microfibrils of guard cells are oriented radially
4 All of the above
Explanation:
Exp:D The immediate cause of the opening or closing of stomata is a change in the turgidity of the guard cells. The inner wall of each guard cell, towards the pore or stomatal aperture, is thick and elastic. When turgidity increases within the two guard cells flanking each stomatal aperture or pore, the thin outer walls bulge out and force the inner walls into a crescent shape. The opening of the stoma is also aided due to the orientation of the microfibrils in the cell walls of the guard cells. Cellulose microfibrils are oriented radically rather than longitudinally making it easier for the stoma to open.
