Exp:C Quiscent center concept - This concept was given by Clowes and discovered in Zea maize plant. Present in the root. It is cap like or hemicircular group of cells between dermatogens and calyptrogen or between, active meristem and root cap cells are inactive or less active have low amount of DNA, RNA and protein, light cytoplasm and small nuclei, but may be made active when active tissue damage thus act as reservoir and produce active initial.
Manipal-2005
Anatomy of Flowering Plants
271472
Viral infection is usually absent in
1 phloem cells
2 xylem cells
3 pith cells
4 apical meristem
Explanation:
Exp:D Generally, plant shoot apical meristems are virus free. This is because the spread of virus in the plant tissue does not keep up (is slow) with the fast meristem growth if it is actively producing new leaves/flowers. Apical meristem located at the tip of shoot and root. It is primary meristem responsible for primary growth i.e. Growth in length.
VMMC-2009
Anatomy of Flowering Plants
271473
The meristem that is parallel to the longitudinal axis of the plant is
1 procambium
2 intercalary meristem
3 phellogen
4 apical meristem
Explanation:
Exp:C Phellogen is also famous as cork cambium which is a lateral meristem. It increases the girth of the plant and parallel to the longitudinal axis of the plant which is responsible for the development of the periderm. There are cells that grow inwards from there called phelloderm whereas the cells develop outward are known as phellem. Phellem is composed of dead cells and protective in function.
J and K CET-2010
Anatomy of Flowering Plants
271474
Who proposed the histogen theory?
1 Schmidt
2 Hanstein
3 Nageli
4 Mankey
Explanation:
Exp:B The Histogen theory was proposed by Hanstein and supported by Strasburger. According to this theory histogen divided into three layer. Dermatogen - It is outermost single layered cells divide anticlinally which gives rise Epidermis in Shoot apex and Epiblema in root apex. Periblema - Occurs between the dermatogens and plerome, multilayered. It gives. Hypodermis, general cortex and endodermis of shoot apex and root apex. Plerome - Occurs in the center and gives rise stele e.g. Pericycle, primary vascular bundle, pith and pith rays.
Exp:C Quiscent center concept - This concept was given by Clowes and discovered in Zea maize plant. Present in the root. It is cap like or hemicircular group of cells between dermatogens and calyptrogen or between, active meristem and root cap cells are inactive or less active have low amount of DNA, RNA and protein, light cytoplasm and small nuclei, but may be made active when active tissue damage thus act as reservoir and produce active initial.
Manipal-2005
Anatomy of Flowering Plants
271472
Viral infection is usually absent in
1 phloem cells
2 xylem cells
3 pith cells
4 apical meristem
Explanation:
Exp:D Generally, plant shoot apical meristems are virus free. This is because the spread of virus in the plant tissue does not keep up (is slow) with the fast meristem growth if it is actively producing new leaves/flowers. Apical meristem located at the tip of shoot and root. It is primary meristem responsible for primary growth i.e. Growth in length.
VMMC-2009
Anatomy of Flowering Plants
271473
The meristem that is parallel to the longitudinal axis of the plant is
1 procambium
2 intercalary meristem
3 phellogen
4 apical meristem
Explanation:
Exp:C Phellogen is also famous as cork cambium which is a lateral meristem. It increases the girth of the plant and parallel to the longitudinal axis of the plant which is responsible for the development of the periderm. There are cells that grow inwards from there called phelloderm whereas the cells develop outward are known as phellem. Phellem is composed of dead cells and protective in function.
J and K CET-2010
Anatomy of Flowering Plants
271474
Who proposed the histogen theory?
1 Schmidt
2 Hanstein
3 Nageli
4 Mankey
Explanation:
Exp:B The Histogen theory was proposed by Hanstein and supported by Strasburger. According to this theory histogen divided into three layer. Dermatogen - It is outermost single layered cells divide anticlinally which gives rise Epidermis in Shoot apex and Epiblema in root apex. Periblema - Occurs between the dermatogens and plerome, multilayered. It gives. Hypodermis, general cortex and endodermis of shoot apex and root apex. Plerome - Occurs in the center and gives rise stele e.g. Pericycle, primary vascular bundle, pith and pith rays.
Exp:C Quiscent center concept - This concept was given by Clowes and discovered in Zea maize plant. Present in the root. It is cap like or hemicircular group of cells between dermatogens and calyptrogen or between, active meristem and root cap cells are inactive or less active have low amount of DNA, RNA and protein, light cytoplasm and small nuclei, but may be made active when active tissue damage thus act as reservoir and produce active initial.
Manipal-2005
Anatomy of Flowering Plants
271472
Viral infection is usually absent in
1 phloem cells
2 xylem cells
3 pith cells
4 apical meristem
Explanation:
Exp:D Generally, plant shoot apical meristems are virus free. This is because the spread of virus in the plant tissue does not keep up (is slow) with the fast meristem growth if it is actively producing new leaves/flowers. Apical meristem located at the tip of shoot and root. It is primary meristem responsible for primary growth i.e. Growth in length.
VMMC-2009
Anatomy of Flowering Plants
271473
The meristem that is parallel to the longitudinal axis of the plant is
1 procambium
2 intercalary meristem
3 phellogen
4 apical meristem
Explanation:
Exp:C Phellogen is also famous as cork cambium which is a lateral meristem. It increases the girth of the plant and parallel to the longitudinal axis of the plant which is responsible for the development of the periderm. There are cells that grow inwards from there called phelloderm whereas the cells develop outward are known as phellem. Phellem is composed of dead cells and protective in function.
J and K CET-2010
Anatomy of Flowering Plants
271474
Who proposed the histogen theory?
1 Schmidt
2 Hanstein
3 Nageli
4 Mankey
Explanation:
Exp:B The Histogen theory was proposed by Hanstein and supported by Strasburger. According to this theory histogen divided into three layer. Dermatogen - It is outermost single layered cells divide anticlinally which gives rise Epidermis in Shoot apex and Epiblema in root apex. Periblema - Occurs between the dermatogens and plerome, multilayered. It gives. Hypodermis, general cortex and endodermis of shoot apex and root apex. Plerome - Occurs in the center and gives rise stele e.g. Pericycle, primary vascular bundle, pith and pith rays.
Exp:C Quiscent center concept - This concept was given by Clowes and discovered in Zea maize plant. Present in the root. It is cap like or hemicircular group of cells between dermatogens and calyptrogen or between, active meristem and root cap cells are inactive or less active have low amount of DNA, RNA and protein, light cytoplasm and small nuclei, but may be made active when active tissue damage thus act as reservoir and produce active initial.
Manipal-2005
Anatomy of Flowering Plants
271472
Viral infection is usually absent in
1 phloem cells
2 xylem cells
3 pith cells
4 apical meristem
Explanation:
Exp:D Generally, plant shoot apical meristems are virus free. This is because the spread of virus in the plant tissue does not keep up (is slow) with the fast meristem growth if it is actively producing new leaves/flowers. Apical meristem located at the tip of shoot and root. It is primary meristem responsible for primary growth i.e. Growth in length.
VMMC-2009
Anatomy of Flowering Plants
271473
The meristem that is parallel to the longitudinal axis of the plant is
1 procambium
2 intercalary meristem
3 phellogen
4 apical meristem
Explanation:
Exp:C Phellogen is also famous as cork cambium which is a lateral meristem. It increases the girth of the plant and parallel to the longitudinal axis of the plant which is responsible for the development of the periderm. There are cells that grow inwards from there called phelloderm whereas the cells develop outward are known as phellem. Phellem is composed of dead cells and protective in function.
J and K CET-2010
Anatomy of Flowering Plants
271474
Who proposed the histogen theory?
1 Schmidt
2 Hanstein
3 Nageli
4 Mankey
Explanation:
Exp:B The Histogen theory was proposed by Hanstein and supported by Strasburger. According to this theory histogen divided into three layer. Dermatogen - It is outermost single layered cells divide anticlinally which gives rise Epidermis in Shoot apex and Epiblema in root apex. Periblema - Occurs between the dermatogens and plerome, multilayered. It gives. Hypodermis, general cortex and endodermis of shoot apex and root apex. Plerome - Occurs in the center and gives rise stele e.g. Pericycle, primary vascular bundle, pith and pith rays.
