286644
Which one of the following option is correct about bulliform/motor cell ?
1 It is seen in grasses.
2 It is large-sized, thin-walled colourless, vacuolate cells on the adaxial surface.
3 It helps in rolling of leaf to minimise water loss when it is flaccid.
4 All of the above
Explanation:
(d) All the statements are correct regarding Bulliform or motor cells. They are large, bubble-shaped, empty colourless epidermal cells that occur in groups on the upper surface of the leaves of many grasses. Loss of turgor pressure in these cells causes leaves to "roll up" during water stress.
Anatomy of Flowering Plants(NCERT)
286645
Which of the following are present in monocot root?
1 conjoint, collateral, open polyarch vascular bundle.
(d) The internal structure of a typical monocotyledon root is similar to dicotyledon root. Number of xylem bundles are more than six (polyarch) in monocotyledon root (exceptionally the number of xylem bundles are two to six in onion). Pith is well developed in monocotyledon root. Monocot roots do not undergo secondary growth.
Anatomy of Flowering Plants(NCERT)
286646
Where do the casparian bands occur?
1 Epidermis
2 Endodermis
3 Pericycle
4 Phloem
Explanation:
(b) Endodermis or innermost layer of cortex has casparian strips in roots. It is called starch sheath in dicot stems. It separates cortex from stele. The cell walls are thickened at the corners in angular collenchyma.
Anatomy of Flowering Plants(NCERT)
286647
In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden. After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?
1 With the help of bulliform cells.
2 With the help of casparian strips.
3 With the help of vascular bundles.
4 With the help of stomatal apparatus.
Explanation:
(c) By observing the arrangements of vascular bundles, the student will discover the nature of stem. If the vascular bundles are arranged in a ring then it is a dicot stem and if the vascular bundles are scattered, then it is a monocot stem.
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Anatomy of Flowering Plants(NCERT)
286644
Which one of the following option is correct about bulliform/motor cell ?
1 It is seen in grasses.
2 It is large-sized, thin-walled colourless, vacuolate cells on the adaxial surface.
3 It helps in rolling of leaf to minimise water loss when it is flaccid.
4 All of the above
Explanation:
(d) All the statements are correct regarding Bulliform or motor cells. They are large, bubble-shaped, empty colourless epidermal cells that occur in groups on the upper surface of the leaves of many grasses. Loss of turgor pressure in these cells causes leaves to "roll up" during water stress.
Anatomy of Flowering Plants(NCERT)
286645
Which of the following are present in monocot root?
1 conjoint, collateral, open polyarch vascular bundle.
(d) The internal structure of a typical monocotyledon root is similar to dicotyledon root. Number of xylem bundles are more than six (polyarch) in monocotyledon root (exceptionally the number of xylem bundles are two to six in onion). Pith is well developed in monocotyledon root. Monocot roots do not undergo secondary growth.
Anatomy of Flowering Plants(NCERT)
286646
Where do the casparian bands occur?
1 Epidermis
2 Endodermis
3 Pericycle
4 Phloem
Explanation:
(b) Endodermis or innermost layer of cortex has casparian strips in roots. It is called starch sheath in dicot stems. It separates cortex from stele. The cell walls are thickened at the corners in angular collenchyma.
Anatomy of Flowering Plants(NCERT)
286647
In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden. After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?
1 With the help of bulliform cells.
2 With the help of casparian strips.
3 With the help of vascular bundles.
4 With the help of stomatal apparatus.
Explanation:
(c) By observing the arrangements of vascular bundles, the student will discover the nature of stem. If the vascular bundles are arranged in a ring then it is a dicot stem and if the vascular bundles are scattered, then it is a monocot stem.
286644
Which one of the following option is correct about bulliform/motor cell ?
1 It is seen in grasses.
2 It is large-sized, thin-walled colourless, vacuolate cells on the adaxial surface.
3 It helps in rolling of leaf to minimise water loss when it is flaccid.
4 All of the above
Explanation:
(d) All the statements are correct regarding Bulliform or motor cells. They are large, bubble-shaped, empty colourless epidermal cells that occur in groups on the upper surface of the leaves of many grasses. Loss of turgor pressure in these cells causes leaves to "roll up" during water stress.
Anatomy of Flowering Plants(NCERT)
286645
Which of the following are present in monocot root?
1 conjoint, collateral, open polyarch vascular bundle.
(d) The internal structure of a typical monocotyledon root is similar to dicotyledon root. Number of xylem bundles are more than six (polyarch) in monocotyledon root (exceptionally the number of xylem bundles are two to six in onion). Pith is well developed in monocotyledon root. Monocot roots do not undergo secondary growth.
Anatomy of Flowering Plants(NCERT)
286646
Where do the casparian bands occur?
1 Epidermis
2 Endodermis
3 Pericycle
4 Phloem
Explanation:
(b) Endodermis or innermost layer of cortex has casparian strips in roots. It is called starch sheath in dicot stems. It separates cortex from stele. The cell walls are thickened at the corners in angular collenchyma.
Anatomy of Flowering Plants(NCERT)
286647
In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden. After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?
1 With the help of bulliform cells.
2 With the help of casparian strips.
3 With the help of vascular bundles.
4 With the help of stomatal apparatus.
Explanation:
(c) By observing the arrangements of vascular bundles, the student will discover the nature of stem. If the vascular bundles are arranged in a ring then it is a dicot stem and if the vascular bundles are scattered, then it is a monocot stem.
286644
Which one of the following option is correct about bulliform/motor cell ?
1 It is seen in grasses.
2 It is large-sized, thin-walled colourless, vacuolate cells on the adaxial surface.
3 It helps in rolling of leaf to minimise water loss when it is flaccid.
4 All of the above
Explanation:
(d) All the statements are correct regarding Bulliform or motor cells. They are large, bubble-shaped, empty colourless epidermal cells that occur in groups on the upper surface of the leaves of many grasses. Loss of turgor pressure in these cells causes leaves to "roll up" during water stress.
Anatomy of Flowering Plants(NCERT)
286645
Which of the following are present in monocot root?
1 conjoint, collateral, open polyarch vascular bundle.
(d) The internal structure of a typical monocotyledon root is similar to dicotyledon root. Number of xylem bundles are more than six (polyarch) in monocotyledon root (exceptionally the number of xylem bundles are two to six in onion). Pith is well developed in monocotyledon root. Monocot roots do not undergo secondary growth.
Anatomy of Flowering Plants(NCERT)
286646
Where do the casparian bands occur?
1 Epidermis
2 Endodermis
3 Pericycle
4 Phloem
Explanation:
(b) Endodermis or innermost layer of cortex has casparian strips in roots. It is called starch sheath in dicot stems. It separates cortex from stele. The cell walls are thickened at the corners in angular collenchyma.
Anatomy of Flowering Plants(NCERT)
286647
In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden. After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?
1 With the help of bulliform cells.
2 With the help of casparian strips.
3 With the help of vascular bundles.
4 With the help of stomatal apparatus.
Explanation:
(c) By observing the arrangements of vascular bundles, the student will discover the nature of stem. If the vascular bundles are arranged in a ring then it is a dicot stem and if the vascular bundles are scattered, then it is a monocot stem.