62117
Roots play insignificant role in absorption of water in
1 Wheat
2 Sunflower
3 Pistia
4 Pea
Explanation:
C Pistia is hydrophyte and in hydrophyte roots are poorly developed. Roots play insignificant role in absorption of water in pistia. Pistia, also known as water lettuce - Hydrophytes are free floating plants float on surface. How ever roots are well developed in mesophyte and Xerophytes.
AIPMT (Re-Exam)-2015
Morphology of Plants
62118
The cells of the quiescent centre are characterised by
1 having dense cytoplasm and prominent nuclei
2 having light cytoplasm and small nuclei
3 dividing regularly to add to the corpus
4 dividing regularly to add to tunica
Explanation:
B Quiescent centre is a region in the apical meristem of a root where cells do not divided or the cell division proceeds at a very slow rate. The cells with a quiescent centre have small dictyosomes, nuclei and nucleoli with little cytoplasm. These cells contain endoplasmic reticulum, mitochondria and contain low concentrations of RNA, DNA and protein.
AIIMS-2008
Morphology of Plants
62120
Which of the following feature connot be considered to distinguish underground stem from a root?
1 Presence of nodes and internodes
2 Presence of axillary and terminal buds
3 Absence of scale leaves and adventitious roots arising from nodes
4 Presence of exogenous branches
Explanation:
C Rhizomes are underground stems which grow beneath the surface of soil, they are frequently fleshy and serve as organs of food storage. Sometimes the rhizomes are condensed into solid swollen forms, which are known as corms. The tubers are also underground parts which may either be modified roots or stems.
MGIMS Wardha-2015
Morphology of Plants
62121
What will be the correct sequence of four zone in a longitudinal section of root, starting from the tip upward?
B Root cap \(\rightarrow\) Cell division \(\rightarrow\) Cell enlargement \(\rightarrow\) Cell maturation. (i) Root cap :- The root cap, a small tissue at the tip of the root protects the root from environmental stress and function in gravity perception. (ii) Cell division :- An apical meristem lies behind the root cap and it produces the cells that give rise to the primary body of the plant. (iii) Cell growth :- Cell growth is as fundamental for growth of organisms as is cell division implicit in cell growth is an increase in cell size. (iv) Cell maturation :- The cellular developmental process, independent of morphogenetic change, that is required for a specific cell to attained fully functional state.
62117
Roots play insignificant role in absorption of water in
1 Wheat
2 Sunflower
3 Pistia
4 Pea
Explanation:
C Pistia is hydrophyte and in hydrophyte roots are poorly developed. Roots play insignificant role in absorption of water in pistia. Pistia, also known as water lettuce - Hydrophytes are free floating plants float on surface. How ever roots are well developed in mesophyte and Xerophytes.
AIPMT (Re-Exam)-2015
Morphology of Plants
62118
The cells of the quiescent centre are characterised by
1 having dense cytoplasm and prominent nuclei
2 having light cytoplasm and small nuclei
3 dividing regularly to add to the corpus
4 dividing regularly to add to tunica
Explanation:
B Quiescent centre is a region in the apical meristem of a root where cells do not divided or the cell division proceeds at a very slow rate. The cells with a quiescent centre have small dictyosomes, nuclei and nucleoli with little cytoplasm. These cells contain endoplasmic reticulum, mitochondria and contain low concentrations of RNA, DNA and protein.
AIIMS-2008
Morphology of Plants
62120
Which of the following feature connot be considered to distinguish underground stem from a root?
1 Presence of nodes and internodes
2 Presence of axillary and terminal buds
3 Absence of scale leaves and adventitious roots arising from nodes
4 Presence of exogenous branches
Explanation:
C Rhizomes are underground stems which grow beneath the surface of soil, they are frequently fleshy and serve as organs of food storage. Sometimes the rhizomes are condensed into solid swollen forms, which are known as corms. The tubers are also underground parts which may either be modified roots or stems.
MGIMS Wardha-2015
Morphology of Plants
62121
What will be the correct sequence of four zone in a longitudinal section of root, starting from the tip upward?
B Root cap \(\rightarrow\) Cell division \(\rightarrow\) Cell enlargement \(\rightarrow\) Cell maturation. (i) Root cap :- The root cap, a small tissue at the tip of the root protects the root from environmental stress and function in gravity perception. (ii) Cell division :- An apical meristem lies behind the root cap and it produces the cells that give rise to the primary body of the plant. (iii) Cell growth :- Cell growth is as fundamental for growth of organisms as is cell division implicit in cell growth is an increase in cell size. (iv) Cell maturation :- The cellular developmental process, independent of morphogenetic change, that is required for a specific cell to attained fully functional state.
62117
Roots play insignificant role in absorption of water in
1 Wheat
2 Sunflower
3 Pistia
4 Pea
Explanation:
C Pistia is hydrophyte and in hydrophyte roots are poorly developed. Roots play insignificant role in absorption of water in pistia. Pistia, also known as water lettuce - Hydrophytes are free floating plants float on surface. How ever roots are well developed in mesophyte and Xerophytes.
AIPMT (Re-Exam)-2015
Morphology of Plants
62118
The cells of the quiescent centre are characterised by
1 having dense cytoplasm and prominent nuclei
2 having light cytoplasm and small nuclei
3 dividing regularly to add to the corpus
4 dividing regularly to add to tunica
Explanation:
B Quiescent centre is a region in the apical meristem of a root where cells do not divided or the cell division proceeds at a very slow rate. The cells with a quiescent centre have small dictyosomes, nuclei and nucleoli with little cytoplasm. These cells contain endoplasmic reticulum, mitochondria and contain low concentrations of RNA, DNA and protein.
AIIMS-2008
Morphology of Plants
62120
Which of the following feature connot be considered to distinguish underground stem from a root?
1 Presence of nodes and internodes
2 Presence of axillary and terminal buds
3 Absence of scale leaves and adventitious roots arising from nodes
4 Presence of exogenous branches
Explanation:
C Rhizomes are underground stems which grow beneath the surface of soil, they are frequently fleshy and serve as organs of food storage. Sometimes the rhizomes are condensed into solid swollen forms, which are known as corms. The tubers are also underground parts which may either be modified roots or stems.
MGIMS Wardha-2015
Morphology of Plants
62121
What will be the correct sequence of four zone in a longitudinal section of root, starting from the tip upward?
B Root cap \(\rightarrow\) Cell division \(\rightarrow\) Cell enlargement \(\rightarrow\) Cell maturation. (i) Root cap :- The root cap, a small tissue at the tip of the root protects the root from environmental stress and function in gravity perception. (ii) Cell division :- An apical meristem lies behind the root cap and it produces the cells that give rise to the primary body of the plant. (iii) Cell growth :- Cell growth is as fundamental for growth of organisms as is cell division implicit in cell growth is an increase in cell size. (iv) Cell maturation :- The cellular developmental process, independent of morphogenetic change, that is required for a specific cell to attained fully functional state.
62117
Roots play insignificant role in absorption of water in
1 Wheat
2 Sunflower
3 Pistia
4 Pea
Explanation:
C Pistia is hydrophyte and in hydrophyte roots are poorly developed. Roots play insignificant role in absorption of water in pistia. Pistia, also known as water lettuce - Hydrophytes are free floating plants float on surface. How ever roots are well developed in mesophyte and Xerophytes.
AIPMT (Re-Exam)-2015
Morphology of Plants
62118
The cells of the quiescent centre are characterised by
1 having dense cytoplasm and prominent nuclei
2 having light cytoplasm and small nuclei
3 dividing regularly to add to the corpus
4 dividing regularly to add to tunica
Explanation:
B Quiescent centre is a region in the apical meristem of a root where cells do not divided or the cell division proceeds at a very slow rate. The cells with a quiescent centre have small dictyosomes, nuclei and nucleoli with little cytoplasm. These cells contain endoplasmic reticulum, mitochondria and contain low concentrations of RNA, DNA and protein.
AIIMS-2008
Morphology of Plants
62120
Which of the following feature connot be considered to distinguish underground stem from a root?
1 Presence of nodes and internodes
2 Presence of axillary and terminal buds
3 Absence of scale leaves and adventitious roots arising from nodes
4 Presence of exogenous branches
Explanation:
C Rhizomes are underground stems which grow beneath the surface of soil, they are frequently fleshy and serve as organs of food storage. Sometimes the rhizomes are condensed into solid swollen forms, which are known as corms. The tubers are also underground parts which may either be modified roots or stems.
MGIMS Wardha-2015
Morphology of Plants
62121
What will be the correct sequence of four zone in a longitudinal section of root, starting from the tip upward?
B Root cap \(\rightarrow\) Cell division \(\rightarrow\) Cell enlargement \(\rightarrow\) Cell maturation. (i) Root cap :- The root cap, a small tissue at the tip of the root protects the root from environmental stress and function in gravity perception. (ii) Cell division :- An apical meristem lies behind the root cap and it produces the cells that give rise to the primary body of the plant. (iii) Cell growth :- Cell growth is as fundamental for growth of organisms as is cell division implicit in cell growth is an increase in cell size. (iv) Cell maturation :- The cellular developmental process, independent of morphogenetic change, that is required for a specific cell to attained fully functional state.
