285772
A nail is driven into the trunk of a 30 year old tree at a point one meter above the soil level. The tree grows in height at the rate of 0.5 meters a year. After three years, the nail will be
1 1 meter above the soil
2 1.5 meter above the soil
3 2 meters above the soil
4 2.5 meters above the soil
5 3 meters above the soil level
Explanation:
(a)The nail will be 1 meter above the soil because when tree grows in height it will not affect the base level (Tree grows in height from apical region).
NCERT 90
Anatomy of Flowering Plants(NCERT)
285773
Identify the wrong statement in context of heartwood.
1 Organic compounds are deposited in it.
2 It is highly durable.
3 It conducts water and minerals efficiently.
4 It comprises dead elements with highly lignified walls.
Explanation:
(b)Heartwood is strong, durable and resistant to decay. It does not conduct water and minerals because of the presence of dead elements. The conduction of water and minerals is carried out by sapwood because it contains living cells.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285774
Which of the following is made up of dead cells?
1 Xylem parenchyma
2 Collenchyma
3 Phellem
4 Phloem
Explanation:
(c)Phellem or cork is made up of dead cells. It is a tissue formed on the outer side of cork cambium. It is composed of dead cells. The cell wall become impermeable due to suberisation.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285775
The vascular cambium normally gives rise to
1 phelloderm
2 primary phloem
3 secondary xylem
4 periderm
Explanation:
(c)The vascular cambium normally gives rise to secondary xylem. Vascular cambium is located between xylem and phloem in the stems and roots of vascular plants. It produces secondary xylem towards the pith and secondary phloem towards the bark.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285776
The balloon-shaped structures called tyloses
1 originate in the lumen of vessels
2 characterise the sapwood
3 are extensions of xylem parenchyma cells into vessels
4 are linked to the ascent of sap through xylem vessels
Explanation:
(c)The tyloses are the structures found in the woody tissues of dicot stems. These are balloon shaped cells formed due to the extensions of xylem parenchyma cells into the vessel elements.
285772
A nail is driven into the trunk of a 30 year old tree at a point one meter above the soil level. The tree grows in height at the rate of 0.5 meters a year. After three years, the nail will be
1 1 meter above the soil
2 1.5 meter above the soil
3 2 meters above the soil
4 2.5 meters above the soil
5 3 meters above the soil level
Explanation:
(a)The nail will be 1 meter above the soil because when tree grows in height it will not affect the base level (Tree grows in height from apical region).
NCERT 90
Anatomy of Flowering Plants(NCERT)
285773
Identify the wrong statement in context of heartwood.
1 Organic compounds are deposited in it.
2 It is highly durable.
3 It conducts water and minerals efficiently.
4 It comprises dead elements with highly lignified walls.
Explanation:
(b)Heartwood is strong, durable and resistant to decay. It does not conduct water and minerals because of the presence of dead elements. The conduction of water and minerals is carried out by sapwood because it contains living cells.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285774
Which of the following is made up of dead cells?
1 Xylem parenchyma
2 Collenchyma
3 Phellem
4 Phloem
Explanation:
(c)Phellem or cork is made up of dead cells. It is a tissue formed on the outer side of cork cambium. It is composed of dead cells. The cell wall become impermeable due to suberisation.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285775
The vascular cambium normally gives rise to
1 phelloderm
2 primary phloem
3 secondary xylem
4 periderm
Explanation:
(c)The vascular cambium normally gives rise to secondary xylem. Vascular cambium is located between xylem and phloem in the stems and roots of vascular plants. It produces secondary xylem towards the pith and secondary phloem towards the bark.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285776
The balloon-shaped structures called tyloses
1 originate in the lumen of vessels
2 characterise the sapwood
3 are extensions of xylem parenchyma cells into vessels
4 are linked to the ascent of sap through xylem vessels
Explanation:
(c)The tyloses are the structures found in the woody tissues of dicot stems. These are balloon shaped cells formed due to the extensions of xylem parenchyma cells into the vessel elements.
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Anatomy of Flowering Plants(NCERT)
285772
A nail is driven into the trunk of a 30 year old tree at a point one meter above the soil level. The tree grows in height at the rate of 0.5 meters a year. After three years, the nail will be
1 1 meter above the soil
2 1.5 meter above the soil
3 2 meters above the soil
4 2.5 meters above the soil
5 3 meters above the soil level
Explanation:
(a)The nail will be 1 meter above the soil because when tree grows in height it will not affect the base level (Tree grows in height from apical region).
NCERT 90
Anatomy of Flowering Plants(NCERT)
285773
Identify the wrong statement in context of heartwood.
1 Organic compounds are deposited in it.
2 It is highly durable.
3 It conducts water and minerals efficiently.
4 It comprises dead elements with highly lignified walls.
Explanation:
(b)Heartwood is strong, durable and resistant to decay. It does not conduct water and minerals because of the presence of dead elements. The conduction of water and minerals is carried out by sapwood because it contains living cells.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285774
Which of the following is made up of dead cells?
1 Xylem parenchyma
2 Collenchyma
3 Phellem
4 Phloem
Explanation:
(c)Phellem or cork is made up of dead cells. It is a tissue formed on the outer side of cork cambium. It is composed of dead cells. The cell wall become impermeable due to suberisation.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285775
The vascular cambium normally gives rise to
1 phelloderm
2 primary phloem
3 secondary xylem
4 periderm
Explanation:
(c)The vascular cambium normally gives rise to secondary xylem. Vascular cambium is located between xylem and phloem in the stems and roots of vascular plants. It produces secondary xylem towards the pith and secondary phloem towards the bark.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285776
The balloon-shaped structures called tyloses
1 originate in the lumen of vessels
2 characterise the sapwood
3 are extensions of xylem parenchyma cells into vessels
4 are linked to the ascent of sap through xylem vessels
Explanation:
(c)The tyloses are the structures found in the woody tissues of dicot stems. These are balloon shaped cells formed due to the extensions of xylem parenchyma cells into the vessel elements.
285772
A nail is driven into the trunk of a 30 year old tree at a point one meter above the soil level. The tree grows in height at the rate of 0.5 meters a year. After three years, the nail will be
1 1 meter above the soil
2 1.5 meter above the soil
3 2 meters above the soil
4 2.5 meters above the soil
5 3 meters above the soil level
Explanation:
(a)The nail will be 1 meter above the soil because when tree grows in height it will not affect the base level (Tree grows in height from apical region).
NCERT 90
Anatomy of Flowering Plants(NCERT)
285773
Identify the wrong statement in context of heartwood.
1 Organic compounds are deposited in it.
2 It is highly durable.
3 It conducts water and minerals efficiently.
4 It comprises dead elements with highly lignified walls.
Explanation:
(b)Heartwood is strong, durable and resistant to decay. It does not conduct water and minerals because of the presence of dead elements. The conduction of water and minerals is carried out by sapwood because it contains living cells.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285774
Which of the following is made up of dead cells?
1 Xylem parenchyma
2 Collenchyma
3 Phellem
4 Phloem
Explanation:
(c)Phellem or cork is made up of dead cells. It is a tissue formed on the outer side of cork cambium. It is composed of dead cells. The cell wall become impermeable due to suberisation.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285775
The vascular cambium normally gives rise to
1 phelloderm
2 primary phloem
3 secondary xylem
4 periderm
Explanation:
(c)The vascular cambium normally gives rise to secondary xylem. Vascular cambium is located between xylem and phloem in the stems and roots of vascular plants. It produces secondary xylem towards the pith and secondary phloem towards the bark.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285776
The balloon-shaped structures called tyloses
1 originate in the lumen of vessels
2 characterise the sapwood
3 are extensions of xylem parenchyma cells into vessels
4 are linked to the ascent of sap through xylem vessels
Explanation:
(c)The tyloses are the structures found in the woody tissues of dicot stems. These are balloon shaped cells formed due to the extensions of xylem parenchyma cells into the vessel elements.
285772
A nail is driven into the trunk of a 30 year old tree at a point one meter above the soil level. The tree grows in height at the rate of 0.5 meters a year. After three years, the nail will be
1 1 meter above the soil
2 1.5 meter above the soil
3 2 meters above the soil
4 2.5 meters above the soil
5 3 meters above the soil level
Explanation:
(a)The nail will be 1 meter above the soil because when tree grows in height it will not affect the base level (Tree grows in height from apical region).
NCERT 90
Anatomy of Flowering Plants(NCERT)
285773
Identify the wrong statement in context of heartwood.
1 Organic compounds are deposited in it.
2 It is highly durable.
3 It conducts water and minerals efficiently.
4 It comprises dead elements with highly lignified walls.
Explanation:
(b)Heartwood is strong, durable and resistant to decay. It does not conduct water and minerals because of the presence of dead elements. The conduction of water and minerals is carried out by sapwood because it contains living cells.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285774
Which of the following is made up of dead cells?
1 Xylem parenchyma
2 Collenchyma
3 Phellem
4 Phloem
Explanation:
(c)Phellem or cork is made up of dead cells. It is a tissue formed on the outer side of cork cambium. It is composed of dead cells. The cell wall become impermeable due to suberisation.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285775
The vascular cambium normally gives rise to
1 phelloderm
2 primary phloem
3 secondary xylem
4 periderm
Explanation:
(c)The vascular cambium normally gives rise to secondary xylem. Vascular cambium is located between xylem and phloem in the stems and roots of vascular plants. It produces secondary xylem towards the pith and secondary phloem towards the bark.
NEET-2017
Anatomy of Flowering Plants(NCERT)
285776
The balloon-shaped structures called tyloses
1 originate in the lumen of vessels
2 characterise the sapwood
3 are extensions of xylem parenchyma cells into vessels
4 are linked to the ascent of sap through xylem vessels
Explanation:
(c)The tyloses are the structures found in the woody tissues of dicot stems. These are balloon shaped cells formed due to the extensions of xylem parenchyma cells into the vessel elements.